Loud COW-MOOING SOUND AND Check Engine Light
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Loud COW-MOOING SOUND AND Check Engine Light - 6/7/2007 12:34:14 AM
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happytolearn
Posts: 6
Joined: 6/7/2007
Status: offline
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Hi, I just bought a 2000 MPV in Florida, and it is now in New York. Last night, I drove it out, and only 2 minutes later, it started making weird and loud cow-mooing sound (that seems to be coming out from the engine room) for about 5 minutes. I turned the ignition off, and restarted the engine, and that weird sound went away. Then, I drove about 2-3 miles, and the check engine light suddenly went off. I wonder why I had CEL on. Is a reason for CEL related to that weird and loud cow-mooing sound? I am concerned.
Thank you very much for your help in advance. Thank you, thank you, and thank you!
< Message edited by happytolearn -- 6/7/2007 12:54:16 AM >
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RE: Loud COW-MOOING SOUND AND Check Engine Light - 6/7/2007 7:34:18 AM
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happytolearn
Posts: 6
Joined: 6/7/2007
Status: offline
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 I checked the CEL code, and it was P0136 causing the CEL turned on. Here is the description I got:
"The PCM has determined that a malfunction exists in the electrical circuit for oxygen sensor 2 in bank 1."
Defintion: H02S 12 circuit condition (heated oxygen sensor bank 1 sensor 2)
Explanation: The powertrain control module uses the oxygen sensor to calculate the air/fuel ratio in the exhaust.
Probable Causes:
1. Oxygen sensor defective
2. Fuel system running very rich or lean-check other codes first
3. Engine misfire condition-repair
4. Fuel pressure very high or low-fuel pump or pressure regulator
I have a few other things to report on this car.
a) the exhaust which is right next to the motor is creating a noise (fast and continuous, as well as relatively loud, tapping noise) when hit the gas (not when idle), checked by a mechanic, was told it was nothing major, no need to worry.
b) I had ignition problems several times, had the problem last night and this morning too. When turn the ignition on, I could hear grinding noise, and the car won't start. I tried it again, it still didn't start. Then, I set the key on ACC for few seconds, and turn the ignition, then it starts. It starts fine thereafter. Last night and this morning, it was a little chilly in Buffalo, NY by the way. This morning, when I started the engine, the temperature needle was way below "C", and the rpm went up to 2,000 rpm. I let the engine run idel for couple minutes till the rpm dropped down to 1,000rpm and the temperature needles went up above "C". Changing gear (by hand) seems to be less smoother when the vehicle is not warmed up.
c) I uses 89 gas in general, and used 93 gas last time when I filled the tank along with a small bottle of fuel injection cleaner that I got from CarQuest. Can using too high octaned GAS cause the CEL?
d) This morning, I had battery and alternator checked at Advanced Auto Parts, and they were both fine.
e) Last week, two dash board bulbs were blown out, and they were replaced. Can this be related to the CEL? Also, my triptometer/odometer stays on for a while (at least several minutes) even after the engine is shut off. Is this normal for Mazda MPV? I feel it weird though.
f) One last thing, I turned the heater on last night because it was quite chilly. Coincidantly, the CEL went off last night.
I asked an AutoZone guy to reset or clear a code, but he couldn't do it. Do I have to replace the O2 sensor right away? Should I wait for several days or couple weeks to see if the CEL automatically goes away? What would be the average cost for removing the CEL in this case (replacing O2 sensor)? I hope it won't cost too much.
I am sorry that I have so many questions. I thank you and I appreciate very much.
< Message edited by happytolearn -- 6/7/2007 8:40:49 AM >
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Printable Version
Thank you very much for your quick help. I'll go to a local Auto-Zone to get CEL codes, and will find out what the causes are. Hope it is nothing or very minor issue.
