2000 Mazda MPV airbag light flashing
 

My airbag light is flashing and the dealer says I need to replace the "SAS module" at a total cost of $558.10 (plus other repairs related to "check engine light"). I'm pretty mechanically and electrically inclined (I'm anelectricalengineer),and I've seen websites that offer module repair, or I can also find a replacement part online (eBay or other sources), both options less than $100. I can't imagine that this procedure is that complicated, provided that the correct steps are taken to ensure the airbags are not set off, etc. To begin with, I don't know where my module is located. Is this something that shouldtruly be left to the dealer, or can I save myself some $$$ here? Any advice is appreciated.

RE: 2000 Mazda MPV airbag light flashing
 

You can probably save a bunch of money to replace by yourself as it is not a complicated procedure. That SAS module is located in the center of the van below the dash. Will see if can pull up some pics on replace, The only precauction is to disonncect the battery for at least one minute to allow the backup battery for SAS to drain so you do not deploy the airbags when unplugging the module. Did they give you a failure code for why the SAS module needed to replaced??

RE: 2000 Mazda MPV airbag light flashing
 

No, they did not give me the failure code, which kind of bothered me. They just said it needed to be replaced - probably electronics went bad. Being skeptical of dealers, I took that as a way for them to make a few extra bucks. Would the standard OBDII scan reveal the code, or do they use a different scan tool for that? If it is relavent, I could get a scan done at AutoZone.

RE: 2000 Mazda MPV airbag light flashing
 

Autozone will not be able to retrieve an air bag code. Only engine and transmission codes typically. You can actually get the code yourself by watching how the light is flashing. This is called a lightflash code. Start with key off and then turn to "run" position. SAS light should illuminate for approx 6 seconds and then shut off. If there is a current, active failure in the system then the light will start flashing. This is outputing a code by counting the number and duration of the flashes. Long flashes ( light on for 1.5 seconds) are for the tens digit and short flashes ( light on for 1/2 second ) is a ones digit. See diagram below. Code #2 would be two short flashes followed by a pause and then repeat the two short flashes. Code #35 would be 3 long flashes, then 5 short flashes, pause and repeat. Hope that makes sense. Drawing below is a code #22. Available codes for 2000 MPV will be 1, 2, 3, 6, 7, 22, 25, 26, 32, 35, 37, 91, or just flashing constantly. See what you come up with using that.

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RE: 2000 Mazda MPV airbag light flashing
 

Awesome! Thank you. I did notice a pattern, but didn't know where to find the "secret decoder". I will check it out ASAP (wife is out with the car right now...)

RE: 2000 Mazda MPV airbag light flashing
 

OK, based on your instructions, it looks like a #2 code (2 short flashes followed by a 3 second pause, then repeat).

RE: 2000 Mazda MPV airbag light flashing
 

Had the feeling that might be the case djn. Most of the time when you get a code number there are a series of checks of various components or wiring to look at and follow a troubleshooting routine. With code #2 there is only one. Internal SAS module fault and replace the module. Nothing else. The SAS module is quite easy to replace. Couple of diagrams below to show you where everything is at. The SAS module is just to the left of the gas pedal. In the second diagram below that part on the left is the gas pedal and only a couple of nuts to remove to get out of there and replace. Part number for a new module is LC62-57-K30A and is available from www.onlinemazdaparts.com for $235.28. Dealer will run you $294.10. Just use the "Search by Factory Part Number" box and it will come up (that is a zero in the part number and not the letter O). Just remember to disconnect the negative battery cablefor 5 minutes before starting to allow the air bag back up battery to deplete and you will be completely safe and ready to replace that little bugger. Once you have replaced the air bag module do not be alarmed if when you turn the key on the light starts flashing continuously. Only means that you need to initialize the system. Again a simple procedure. Turn the key back to 'off ' position and wait for more than 1 second. Turn key back on or start the van and system should be initialized. If not the turn key back off and give a few more second before turning back on. That should get you squared away to replace yourself just fine and save a couple hundred bucks.
p.s. what was the additional repairs for the CEL. Maybe we can work on that one too.:D

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RE: 2000 Mazda MPV airbag light flashing
 

babyhuey - Again, thanks for the assistance. I very much appreciate you taking the time to respond.

I did consider the other repairs related to the CEL - more on that in a minute.I wanted to ask a few more things on the airbag. Have you ever heard of, or had experience withhttp://www.airbagsystems.com/?
They guarantee that they can repair/reprogram any airbag module for $100 or less in 1-2 days (plus shipping time). This is considerably less than the brand new module from www.onlinemazdaparts.com. So, I havea couple of questions related to removing the computer/module. You said that I only need to disconnect the battery negative cable. I've also heard that on some makes/model, you need pull a cable (airbag wire harness) from behind the steering column - not necessary on the MPV? Also, if I went the Airbag Systems repair route, can the MPV be driven while the airbag module is removed? I spoke to a rep from the company and they said yes, but that does not seem logical if I have to pull the battery cable before removing the module. It would be really embarrassing if I had to take the vehicle back in to the dealer to have the airbag repacked because I was trying to fix it myself.

Now, for the other CEL issues. It was a PO421 code (Warm-up catalyst system efficiency below threshold - Bank 1). There was a previous post on this that you had replied to and pretty much diagnosed. My right exhaust manifold is cracked, and an O2 sensor needs to be replaced (Bank 1, #2 sensor), along with some nuts & gaskets... $1,500. I have all the part numbers for the parts that need to be replaced - I just don't know where to find them on the underside of the vehicle (there's 4 O2 sensors on the MPV). If I could get my hands on the Mazda service manual for the MPV.... They listed 4 hours labor to replace the manifold, so I figured it would take me at least 2-3 times that. I only have a 2 ton floor jack and don't have the luxury of being able to walk under that car while it's on the lift. Given that, is this bugger going to be tough to do myself? I imagine the O2 sensor is a piece of cake (unscrew, unplug, & replace) even though they want to charge an hour labor for that, and it's probably already easily accessible once the manifold is off.

One other this they suggested due to my high mileage (170K miles)was an "EFI kit" which would help remove carbon deposits. It looked like a couple of bottles of something you put in the gas tank. I sort of bought into this because my gas pedal has been sticking and I've heard that can be due to carbon deposits, but I'm reluctant to pay $200 bucks for that when I can probably buy something similar at AutoZone and pour it in the gas tank myself. What do you think?

Sorry for the lengthy post. I'm trying to be thorough.

RE: 2000 Mazda MPV airbag light flashing
 

I like thorough djn. You can never have too much information in my opinion.:D No I have never heard of that website and was rather suprised that a company would offer to try and 'fix' a SAS module. In todays market of "I screwed up and was driving too fast and ran into something and my airbags didn't go off so who am I going to sue?", I am very suprised to see that a company would offer to reprogram an SAS module so that it will work again. Note the following in the site

Crash Data, Latch Codes, B1051, B1001, Nissan Code 7 and some flood damaged vehicles can be repaired at a fraction of the replacement cost.
Factory Scan Tools WILL NOT Clear these codes but WE CAN!
Don't let another dealership tell you that it can not be done.

Key word there is "Crash Data, Latch Codes, B1051, B1001, Nissan Code 7 andSOME flood damaged vehicles can be repaired ". "some" hmmmmmm. If they can fix your SAS module then all the better but would contact them first and let them know the code and vehicle that module is out of. They may not be able to "reprogram" an internal failure if it is an actual burnt outboard or internal part.
The other area that am in concern with is that this isTHE vital component to the air bag system in your van. This moduledetermines the direction and severity of impact to the vehicle andessentially you, and based upon the decisions it makes deploys the air bags as needed to hopefully give you a better shot atmaking it thru the whole damn mess in one piece. Comes down to this for me but is your decision to the end. If I were going to go skydiving I would rather have a parashute thatwas packed up and ready from the manufacturer over one that was repacked by someone else on an assembly line that has "what?" experience.Your call on that one.
You need to disconnect the battery cable and wait so that when you disconnect the air bag module connectors you do not get a voltage spike that could potentially deply one or more of the air bags. The system has a back-up battery in the event that the battery is destroyed just after impact. The SAS module would then still has enough stored up energy to deploy the air bags. The back up battery is basically a large capacitor that stores just enough juice to blow the bags in case SAS module looses main battery power. Once you have disconnected the air bag module the system is DEAD. All of the air bag components are connected directly to the module so once it is disconnected the system is completly down. Once you have removed the module you would then reconnconect the battery cable and van will operate as usual but with absolutely no air bag system in operation. Neither of our cars (91 323 and 92 mpv) have air bags so you would be driving just like I do every day, no big deal. Steering column connector is talking about older cars that only had a drivers air bag and does not relate to you.
Code P0421. Cracked exhaust manifold would definitly cause that issue. Not entirely sure that rear O2 would need to be replaced or even if the manifold/warm-up CAT would have to be replaced. A crack in the manifold is going to let oxygen into the exhaust system which is going to throw off the whole CAT check system. The rear O2 sensor is only used to check the "efficiency" of how the CAT is working. A leak upsteam of the rear O2 is going to basically throw a monkey wrench into the whole operating system checks. When the PCM runs a self check of the CAT efficiency it is comparing the readings between the upstream and downstream oxygen sensors. It is looking to see that if the upstream or front O2 sensor is reading normal then looks at the downstream O2 sensor and makes sure that it is giving a fairly steady "rich" or no oxygen in the exhaust reading. If it does not then it sets a CAT efficiency code such as you have. A exhuast leak in the manifold area could give this false reading. Not saying if the CAT is good or bad but only that the exhaust leak could be creating the problem.

RE: 2000 Mazda MPV airbag light flashing
 

Had to extend post to another as I ran out of number ofbits allowed.
4 hours to replace the right side manifold!!!!
warranty time only pays 1.5 hours and Mitchell and Shop Key from Snap On are both still at only 2.0 hours. Padding the bill quite a bit it seems?!?!? Replacing the manifold is not that bad of a job although I have never tried to do the job on a garage floor. Might be a bit of a challenge in that environment. Need some rather lengthy extensions to get to some of the manifold bolts but is certainly do-able.
If the EFI cleaning is only some bottles added to the tank then will not do much good. An intake cleaning is a procedure that adds a chemical into the intake air system that helps to reduce the deposits that tend to accumulate in the intake manifold. Adding something to the fuel tank will only clean the intake valves and maybe the combution chamber . If your throttle is sticking a bit then that is not that uncommon for that year MPV due to carbon build-up at the throttle plate area. Taking off the air inlet and cleaning throttle plate area with an inexpensive Throttle plate/induction cleaner spray and run of the mill old toothbrush will take care of the problem without all the added expense. An intake maniold cleaning is one thing but if you want to fix the sticking throttle you can do by yourself for under $5 and little time.

Sorry for the lengthy post but was just trying to be thorough!!:D:D

RE: 2000 Mazda MPV airbag light flashing
 

You make a compelling arguement regarding the airbag module. I did speak with them on the phone and exchanged e-mails and they test the modules using simulators after they are repaired/reprogrammed to ensure that they will function like new in the event of a crash. If they can't fix it due to damaged electrical components, you pay nothing. I'll have to think about that one some more. In either case, using your advice above,Iwill save some money there (no way that damn thing will take 3 hours to replace like the dealer quoted).

They said the warm up cat is built into the right manifold, so that would get replaced anyway. If I end up having them do the work, maybe I'll ask that they just replace the manifold first and reset the codes, and I'll see if the CEL comes back on. Not knowing where any of the O2 sensors are, I don't know if the labor they quoted for replacing that sensor (1 hour) accounts for the fact they will already have the manifold ripped out. If the sensor doesn't need to be replaced, that saves another $215. You indicated that this is the rear sensor, but the part description for the p/n they gave me (GY0218861B9U) is "Oxygen sensor, mpv, front, lower".

I've looked in all the local auto parts stores for a Chilton's or Hayne's manual for the 2000 MPV and can't find one. In the previous city I lived in, the local library offered access to Mitchell's - not sure if that's common in most places, but I'll have to check. Otherwise, any advice on where to get a decent service manual so I can further investigate the manifold replacement procedure or the throttle plate cleaning?

RE: 2000 Mazda MPV airbag light flashing
 

You should definitely be b\able to replace the air bag module by yourself djn. Have never replaced one yet on a 2000 MPV but does not look tobe that difficult. Luck would have it, I just happen to have a 2000 MPV with CAL emissions towed into the shop today with a siezed up water pump and overheating. Took some pics of the underside in relation to the manifold and O2 sensor in question. Also a few of the throttle body and getting into the cleaning process. The air bag module is located just to the right of the accel pedal and will take a look at how easy/hard will be to install yourself. 3 hours is a ridiculous price to charge for a replace. There is an initialization of module to be performed but is super easy. If this company is giving that kind of quality to their work then maybe will be ok to pursue that course of action. Just being a bit wary of the whole safety thing you know.
The warm-up CAT is indeed build right into the manifold. Would not be a bad idea at all to wait on replacing the downstream sensor and seeing if the CEL comes back on. I doubt that it will for the sensor. I think a lot of shops want to replace both just based on the shotgun approach that if you replace everything then you do not have to worry about a comeback. Sensor will be easy to replace later even then. Cannot believe that they are charging an extra hour for the sensor along with the manifold. The sensor is in the crossover pipe that needs to be removed in order to get access to the manifold and would add a whopping 38 seconds of time to replace once that pipe is out of vehicle!! Save it for later if needed and save the extra expense even if doing the job yourself. I can post some diagrams of manifold R and R straight out of the OE shop manual but is not very accurate. Only indicating that the crossmember needs to be removed and the manifold will fall right out but is wrong. The alternator also needs to be removed and moved around a bit in order to get to the front/upper manifold bolt and to wiggle the bugger out of there but if you can find and shop that will do the job for the listed replace time of 2.0 hours then do think that you will regret the money spent for the labor to have someone else do the job for you.
Am a bit confused about the code and part number for rear O2 as well. The GY02 sensor is a downstream O2 sensor but for the left bank of the engine and not the right bank. The right bank is the one closer to the firewall and left bank is on the radiator side or closest to the front of the vehicle. The P0421 is indicating a right bank CAT failure so why are they going with a left bank downstream O2 sensor? The right bank downstream O2 is a GY04 instead. What kind of part number are they giving you for the manifold/converter? Maybe parts dept just got confused but lets make sure everything matches. By the way you can get the OE warm-up CAT/Manifold for about $180 less if you order thru online resource. Nice kind of savings anyway.
I do see some manuals available online at e-bay sometimes but your van will be a tough nut to crack for one. 2000-2001 is really the only acceptable manual as 98 andearlier isway far different and 02 and later is enough different that would be a problem issome areas. Will post you up some pics of the CAT, throttle area in the morning so let me know ASAP if you want some pics of other areas as should be done with water pump replace by noon and van will be gone back home

RE: 2000 Mazda MPV airbag light flashing
 

CRAP! I just spent a 1/2 hour typing outa response, then lost it due to "session timeout." Since it's late now, this is going to be much shorter. I found a local shop (Tuffy Auto Service) that will do the manifold repair and allow me to supply the parts, so I ordered everything from www.onlinemazdaparts.com today. I'm holding off on the O2 sensor and will see if the light comes back on after replacing the manifold and clearing the codes. So I don't need pics of the manifold, but thanks.

It would be handy to have pics of the throttle body. I did some reading on www.MPVClub.com and the sticking gas pedal seems to be a common problem, easily solved by cleaning the throttle body (even though the dealers seem to be telling most people that the entire throttle body needs to be replaced).

I thought about the SAS module and decided to just order a new one since I was getting the other parts. From my first look, I think that should be pretty easy to do.

RE: 2000 Mazda MPV airbag light flashing
 

Ohhhhhhh, I hate when that happens too djn. [:@][:@][:@]Nothing more irratating then spending all that time typing to have it get lost and never to be found again. Have got into the habit of 'copying' to the clipboard so that I can 'paste' just in case it does that.
Here are some pics of the throttle body. Was replacing a siezed up water pump so took these as I was going back together. Dealer just recommends replace because that is pretty much Mazda's stance on the whole deal. They claim that there is a special coating on the inside of the throttle body that prevents carbon build-up and that cleaning will remove this 'special' coating. Obviously who cares if the coating is washed off as it did not work anyway and that's why it needs to be cleaned!! Have cleaned a bunch and works great. It does come back after 15k miles or so but just reclean. Much cheaper, especially if you are doing the work yourself. Use throttle cleaner as sparingly as possible as much of it will go into the intake manifold. At start up if may crank a long time due to flooding or will run really rough for a short time untill the cleaner is gone. If CEL starts flashing then is just registering the rough running missfire. Removing the negative battery cable for a few minutes will clear the codes and turn the CEL back off.

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Before cleaning. Silver on the outside and then black line where the throttle plate closes.

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After cleaning. See that even the top part of the throttle plate is now clean. Toothbrush and throttle cleaner.

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this is how I ususally do the cleaning. Removing the MAF and accordian tube only. Gives just enough room with minimal parts removal and time. Be careful however of damaging the gasket between the MAF and air cleaner housing. It is only a foam rubber type material and easily tears. Tears will let in dirt to the MAF and engine.

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To get a little more room then take out the accordian tube, MAF, and front air cleaner housing. If van has some miles on it then this is often best way as the accordian tube is very non flexible and you cannot compress enough to remove or damage to the MAF gasket is nearly impossible to avoid.

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And for maximum room to work then pull the battery out too.

RE: 2000 Mazda MPV airbag light flashing
 

Wow, this is excellent! Did your customer get a free cleaning due to my request? Really, I can't believe you went through that trouble of pulling all that junk out of the way for the great pictures - THANKS!!!. If I lived in your town, you would be my mechanic for life.

So is the goal to clean the gunk just off of the plate (i.e. is that what's sticking), or are there other parts deeper in there that need cleaning too? This looks pretty easy either way.

Also, got my manifold today, so should hopefully get that taken care of early next week.

RE: 2000 Mazda MPV airbag light flashing
 

Well yes they did get a free cleaning so I could show you what it looked like djn. Thank you very much for the "be my mechanic for life" That means quite a bit and is a great compliment. Thank you.
The primary goal is to clean the throttlebody bore where the throttle plate contacts as that is the binding spot (black line area of the first pic). Cleaning the plate just helps to reduce the amount of build up and also reduces the chance that some of that carbon will not start transfering to the throttle body itself and while you are in there why not clean up the rest. Deeper in the manifold is even more gunk but will not cause the throttle to stick like it is. The EFI cleaning that you brought up before will help to clean some of the gunk out in the manifold but only if is one that is introduced into the intake system before the throttle plate such as a pressurized spray system that is snaked in under that accordian hose. Fuel additive will not do this
Hope the manifold replace goes over good and the rear O2 is not needed.:)

RE: 2000 Mazda MPV airbag light flashing
 

There is no way I would go with ANYTHING other than the factory parts when it comes to airbags and restraints. These devices are way too important to try to skimp on a couple hundred bucks and have the systems fail on you.

RE: 2000 Mazda MPV airbag light flashing
 

Well, I can't say that was the most fun thing I did on a Saturday, but it's clean now. I ended up having to pull the whole air filter assembly out because that damn accordian tube would not budge. Just when I thought I had all the tubes and electrical wiresdisconnected, I found another one holding it in place. Now I get to do it all over again... the tube has a rip in it, but I had to put it back together so I could drive it this evening. Not sure if it was already there, or if I did it when I manhandled the thing out. I'll have to get a new part and pull it out again. Do you know if that's going to be a dealer (i.e. onlinemazdaparts.com) part or can I get one of those at Autozone? By the way, the pics were a big help in knowing what to look for. Thanks again.

RE: 2000 Mazda MPV airbag light flashing
 

Not a lot of fun djn but do a coupled hundred and will come a lot easier.;)Glad to hear that you were able to get the throttle cleaned out ok but sorry to hear that tube had a tear in it. Is it the accordian tube or some other as there are a mess of them down there? Those rubber hoses and parts get very brittle and hard to remove if they have some miles on them in that hot under hood environment. I doubt that the accordian hose would be available aftermarket but you never know. Would not hurt to google around a bit and see if anything comes up. Let me know what was torn and will get you an OE part number first thing monday morning when I can use the parts computer.


Heres to no more sticky throttle. [sm=groupwave.gif][sm=groupwave.gif]

RE: 2000 Mazda MPV airbag light flashing
 

Yeah, things are always the hardest first time around, then you remember all the things you have to unscrew/unplug when you dive in the next time.... and yes, it was the accordian tube that was torn, on the underside close to the thottle body. I assume that can also let dirt into the engine. I Google'd and checked rockauto.com and couldn't find a part. That would be helpful if you can find it. Otherwise, I can try Jason at onlinemazdaparts (I also need to see if I can replace a rear seat arm rest that the kids destroyed).

OK, now for the really wierd part. During the cleaning of the TB, I had pulled several of the electrical connectors off of the whole air intake assembly, but never pulled the battery cable. When I started the vehicle, the airbag light was no longer flashing (which, as you remember, is what started this whole thread). I made several stops this evening (store, gas, etc) and after about the 3rd time starting the MPV back up, the light came back on. Made one more stop, then started up, and the light is off again. What the heck??? What do you make of that? I don't see how there is any connected from the air intake electrical harnesses to the airbag SAS module... By the way, that's how this whole mess started. The airbag light did this intermittent on/off thing for about a month, then decided to stay on permanently, until today.

RE: 2000 Mazda MPV airbag light flashing
 

A little duct tape on the hose will work as a good short term fix to keep dirty and unmetered air from getting into the engine dgn. I checked a few sites like partsamerica.com but did not find any accordian inlet tubes available. Hopefully can get for not too much $$.
Pulling the electrical connectors should not make any difference with the air bag light at all. Disconnecting the battery would not either. The SAS system does a complete system check when you cycle the key and also monitors on a continuous basis with engine running. Past fault codes in the SAS system can not be cleared either by disconnecting the battery. It is stored as a hard fault and will keep the light on unless the module does a system check and finds all ok. Fault within the SAS module is probably coming and going as they sometimes do but would bet that if you give it a while it will probably come back on with regularity.

RE: 2000 Mazda MPV airbag light flashing
 

The intermitent nature of the light had me concerned that perhaps it was a wiring problem and not the SAS module itself. Must have been coincidence that it went off for the first time in two months after I did the TB cleaning. I'm sure it will come back on again...

RE: 2000 Mazda MPV airbag light flashing
 

It is kind of odd that it would go off after that long of a period being on but do not see any connections or wiring in the area thay you were at that could affect the SAS. Power is supplied thru under dash fuses METER and ENGINE and all of the wiring and ground points are inside the van.
Part number for the accordian hose is GY01-13-220B. (zeros there and not letter o). Looks to be pretty cheap at $20.35 retail.

RE: 2000 Mazda MPV airbag light flashing
 

Thanks for the part number. I'll get that ordered, but may need an O2 sensor as well....

I got the manifold replaced today (and was only charged for 2.3 hours, much better than the 4 the dealer wanted to charge). They cleared the codes for me, and within about 5 miles of leaving the shop, the CEL came back on. So I stopped at AutoZone on the way home and they read a P0037 code (O2 sensor, Bank 1, Sensor 2). I had him clear the code again, expecting it would come on again, but it did not yet come back on (only went about another 8 miles to home). Assuming the light will come back on, it this the same sensor that was on the right exhaust manifold? I looked at a Chilton's diagram online and the text was so small I couldn't tell where the Bank 1 #2 sensor was.

RE: 2000 Mazda MPV airbag light flashing
 

2.3 hours sounds much better djn. The P0037 is indicating a fault in the right bank rear O2 sensor heater circuit. This sensor is located in the crossover pipe that connects both manifold outlets to the rest of the exhaust and yes this is the same one that you were looking at before. The GY04-18-8861b-9U. Not that uncommon for an engine with a few miles to have O2 heaters fail as they are designed to heat the sensor up to a blistering 700-800 'F as fast as possible.The other thing that can throw this code is having left the sensor disconnected after removing the exhaust crossover pipe to replace the manifold. The connector is located on the back side of the intake manifold towards front of engine. Had some pics of both the connector and sensor but deleted them when you were going to have a shop to the work and now do not have a van of that year to retake[:@]. Might just try to take back to the shop and let them know that is possible they forgot to plug back in and have them give it a check.

RE: 2000 Mazda MPV airbag light flashing
 

Well, I finally replaced that SAS module with the brand new part from onlinemazdaparts.com. No more flashing airbag light! The whole thing took less than 30 minutes (and the dealer wanted to charge 3 hours for this!). Thanks toyour help and advice babyhuey, that problem is fixed.

Now I only have to deal with that O2 sensor. They make it confusing enough because the scanner reads "Bank 1, Sensor 2" but the Mazda part descriptions call it "front" and "rear". I'm using this diagram to try to locate it, but this only shows a front and rear sensor. I thought there were 4 sensors on this vehicle? You said this sensor is on the crossover pipe where the exhaust manifolds join, butthe connector is all the way up front on the intake side?It looks like it would be #5 on this diagram. Doyou agree?



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RE: 2000 Mazda MPV airbag light flashing
 

I see your source of confusion djn. That is an exploded exhaust system view of a 1998 and earlier MPV that is rear wheel drive. 2000 and up is very different as they are front wheel drive. Couple of diagrams below that might make more sense. First is similar to yours although nothing is really labeled. Second is component location index diagram. #12 is the O2 sensor that you are having the problem with H02S12.
Not sure why onlinemazda parts calling them front or rear. Maybe refering to "more to front" of vehicle or "more to rear". Mazda parts computer does not list them as such. Only refers to illustion #1, #2, #3, or #4

Here is a little reference guide. Right and left bank is always just like right and left handed as if you were sitting on top of the engine with front of engine and drive belts to your front. Right bank of engine is always Bank #1. Upstream is before the pre-cat and downstream is after the pre-cat.
H02S11 = Heated Oxygen Sensor Bank 1 Sensor 1 = Right bank, upstream sensor
H02S12 = Heated Oxygen Sensor Bank 1 Sensor 2= Right bank, downstream sensor
H02S21 = Heated Oxygen Sensor Bank 2 Sensor 1 = Left bank, upstream sensor
H02S22 = Heated Oxygen Sensor Bank 2 Sensor 2 = Left bank, upstream sensor

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RE: 2000 Mazda MPV airbag light flashing
 

OK, that's clear now. Correct me if I'm wrong, but I should be able to slide up under the vehicle and change this with a wrench and/or pliers, correct? Or is the connector in some obscure place that requires several other parts to be removed?

By the way, in your first diagram, what is #4? A pre-cat? It has a braided steel cover on it. When they were changing my manifold, they pointed out that the connection joining this to the crossover pipe was badly rusted and could break soon.

RE: 2000 Mazda MPV airbag light flashing
 

Yes you should be able to jack up from of van with jackstands and have enough room to get at the sensor. No pliers. It is probably in there pretty tight after all this time and miles. Use a 22mm combination wrench. This is open wrench on one side and box end on the other. Make sure the sensor is correct and then just cut the wires right at the sensor (connector will not fit thru the box end). You can then slip the box end portion of the wrench on and break loose and remove. Can then use the open end part of wrench to tighten as it does not need to be that tight.
The part labeled #4 in the diagram is the crossover pipe that connects the two manifolds and outlet pipe all together. The braided portion is just there to be a flexable joint to allow the engine to move without making the rest of the exhaust system move with it. Would check with an exhaust shop to see if there is a possibility of welding before just replacing. Is just called a front pipe in parts computer. MSRP of $412.45. Part #GY01-40-500H.

[IMG]local://upfiles/1377/771E44261E4A481684193AF9509F422E.jpg[/IMG]
Here is the offending sensor front straight below.

[IMG]local://upfiles/1377/8B64A284DCFD401A9314055D29D0D9E2.jpg[/IMG]
Here is the same sensor taken from rear area.

[IMG]local://upfiles/1377/E83D7F2052F04957A40FF68A44E56AA0.jpg[/IMG]
This is the best image I could get of the sensor connector. This one was not in its mounting bracket but just laying there. It should be just behind and below the coil pack.

RE: 2000 Mazda MPV airbag light flashing
 

babyhuey - thanks for these great photos. I think I should be able to figure this out. I've been so dang busy with work lately I haven't had time to get to this sinceyou posted last. Hopefully this weekend... Thanks again for all the great help & advise you gave for my MPV. -djn

RE: 2000 Mazda MPV airbag light flashing
 

babyhuey - I'm back, I'm confused, and I need your help again please. [:@]
I finally ordered that O2 sensor and was just about to install in today and really got confused once I got up under the vehicle and started looking at the different sensors. I think I may have ordered the wrong part. I thought I ordered the part number you gave me above (GY04-18-8861b-9U) for the rear, downstream (or lower) sensor. What I got is GY02-18-861B-9U, which is front, lower. Here a picture of what I got (if they upload correctly). You can see the little plastic mounting tab on the wire harness, and I can see where this would go on the front sensor (see pic where my finger is pointing to mounting tab). The rear sensor that you pointed out does not have one of these tabs. Also, the partial part number on the sensors do not seem to match. The front sensor on my MPV has this text:

GY01
DENSO
08U20
-4120

The rear has this:

GY01
DENSO
06F21
-4110

The sensor I ordered has:

GY02
DENSO
07H27
-4120

The GY02 and the -4120 are common on my front sensor and the one I ordered.

[IMG]local://upfiles/8181/73BB333B7D624B888005F2B97D4DC80C.jpg[/IMG]

[IMG]local://upfiles/8181/956EA0A7FF944CA8B0DB6051121E79A2.jpg[/IMG]

RE: 2000 Mazda MPV airbag light flashing
 

I possibly ordered the part number that was on my original quote from the dealer, which was for a front lower sensor. That the code they said they were reading. After I had the manifold replaced, is it possible that the front sensor code would clear and then I would get the P0037 code for the rear?

RE: 2000 Mazda MPV airbag light flashing
 

I am getting a little confused now also djn. You should have an oxygen sensor in the top portion of each exhaust manifold which are the right and left side upstream sensors.
Looking back thru our posts I am not seeing any indication of your van being a california emssion or federal emission level so do not know why I have assumed it is california??? A california emission level van would have the downstream oxygen sensors just after the warm up cats. Both downstream sensors would be located on the engine side of that flexible metal braided part of the exhaust. The right side downstream O2 on a california emission van would be in the position just like in the pics below. Both pics are of the same sensor.
On a federal emission level van, both downstream sensors would be located in the exhaust system AFTER the braided metal flex pipe. Does your van resemble the pics?

[IMG]local://upfiles/1377/65A71BC628CD4232BBB3ED97FE234924.jpg[/IMG]

[IMG]local://upfiles/1377/D2225BFA7A524DE087007C5F0D4897F7.jpg[/IMG]

RE: 2000 Mazda MPV airbag light flashing
 

Yes, mine resembles your pics, so it appears I have the California emission. Here's a pic of my van, more of a close up so you can't see the braided sleeve. The other thing that confused me was the location of the connector. From your previous post pics and description, it appeared that you accessed the connector from the top of the engine (near the coil). From my pic, you can see it from the underside, just hanging there next to the alternator. Maybe the yanked it down when they changed that manifold...

[IMG]local://upfiles/8181/1E013D722F484DDB9A21D81F5293AC9D.jpg[/IMG]

[IMG]local://upfiles/8181/E8D8790DB5FC4538B96093C34F3C70DA.jpg[/IMG]

RE: 2000 Mazda MPV airbag light flashing
 

I think somehow I ended up with the GY02 (front lower) instead of GY04 (rear lower). Just spoke to onlinemazda and they are going to swap it out for me. When I went to put it in and things didn't match up exactly as I expected, I just got confused.

RE: 2000 Mazda MPV airbag light flashing
 

Ok djn. Just glad we got that clarified about how your sensors are set up. If it was a federal you would have needed a GY05. Looks like you are exactly right in that you received a GY02 which would indeed be the left bank downstream sensor near the radiator side. The GY04 should get you squared away just fine and glad to hear that onlinemazdaparts will do the exchange for you.:)

DJN : Can fix the air bag problem? I have the same air bag problem in my MPV. Do you replace the SAS module or fixed? Thanks for your help.

Mazda 2001 my engine light is flashing when start engine

Discription on how to load a spare tyre on 2003 MPV
 

Hello,

Just figured out the spare tyre compartment for my 2003 Mazda MPV. Kindly advice how I can upload my spare tyre if possible avail me some pics.

:)Thank you,