Firstly I'm not a qualified mechanic by any stretch I'm just going by what I've read online and with basic knowledge of cars.

So I've got a 2014 mazda 6 2.2d sport grand tourer which I bought from a trader in july, worked absolutely fine up until around a month ago when it started to show the 'low oil pressure, engine damage possible, check oil level' red triangle warning light on the cluster display along with engine management light. At first I thought this was just a sensor issue as I took it to a garage and the oil was below the X marker. He recommended I just drained the oil and changed the filter and oil so I did that and it went off.

For a few weeks. The oil level rose again and this time the oil change due notification come along with the engine management light but no oil pressure light. I then figured out this only happened when the fuel level was below about an 8th of a tank. Once filled back up the warning light would go out and business as usual.

I was getting a bit concerned as this shouldnt be happening so I did a bit of reading online and I read it could be a DPF issue with the oil level rising diesel could be going down into the oil from the injectors spraying extra diesel into the combustion chamber to burn off the excess soot that had accumulated. Thus thinning the oil out and triggering the low oil pressure warning. This made perfect sense as I do a lot of short journey driving in my job, rarely giving the exhaust time to properly regen, plus my fuel economy had dropped down to about 28mpg from the 45mpg I was getting before. So I did a forced regen on it and drove up and down the M1 at about 3000rpm for an hour and this kicked out a lot of smoke after about 20 mins so I was getting my Hopes up.

It seemed to have fixed the issue of fuel economy and the drive felt a hell of a lot smoother so I was really happy. So all that needed to be done was to change the oil again as it had been diluted with diesel and raised above its recommended level.

I did this a couple of nights ago, The oil did smell like diesel and when I took the filter off no excess oil come out after unscrewing which seemed a bit odd as it has every other time I've changed the oil. When refilled and put back together the issue just got worse, it instantly went into limp mode every time I turned the engine on and this time spat out two fault codes:

P0524 - engine oil pressure too low
P055F - engine oil pressure out of range

I cleared the codes using the obd reader I have and it just instantly put them back up. Restarting the engine didnt clear it either. I drove it back home to my house around 2 miles away and the engine sounded extremely loud on tick over like it has no oil running through it at all and is very dry. Almost like a quieter tractor. So my suspicions are pointing towards the oil pump but I dont know if it's the pump or a clogged strainer or another fault because its just beyond my knowledge.

Has anyone else seen or had this fault and can you please help as Mazda are obviously as expected saying it could be upwards of 3k to get this fixed from what I've told them but i want to know if anyone knows exactly what the problem could be so I can just buy the exact bits and replace them instead of buying loads of parts it doesnt need.

Any help at all would be greatly appreciated!! Really dont want to lose this car as I love it and never had problems with Mazda until now (4th mazda car)

Thanks in advance

 

A blocked strainer sounds like the issue here, you should drain the oil and remove the oil pan to inspect the strainer. When diesel fuel mixes with oil it creates a hard carbon like substance that travels through your oil, eventually this can block up your oil strainer. Mazda is replacing these types of engine faults under warranty. I have had cars out of warranty by 4 years and still have an engine replaced by Mazda. So realistically the best option for you is head to a dealership and explain the issue that you are having and 90% chance they will replace the engine for you. The 10% is if you have no service history of the car, or have been viscously driving it. Trust me mechanics know when you have been driving like a maniac.

 

These engines have a very bad reputation for oil pressure issues.

P055F usually results in a new Engine.

Definitely get it towed to a Mazda Dealership.

As mentioned above, Mazda is replacing these engine left, right & centre, for free, even the first ones sold back in late 2012.

 

Thank you for replying and clearing this up, I have in fact taken this to a garage and the strainer is clogged solid, i've had to pay for a new strainer and then labour so i'm looking at just shy of £300 to have this fixed until it happens again.

You say that Mazda will replace the engine for free if I explain the issue, does this include after i've got it fixed? as the codes will have been cleared. although I do have pictures of them showing on an OBD scanner.

The car has had a full service history at Mazda up until about 100k miles and it's now on 145k, i purchased it 6 months ago and it was on 139k so between the mazda services and now it's had garage services. do you think I'll still be able to get this replaced? if i bring in the strainer to them and show them it would that be suffice?

Thanks again

 

I doubt very much they will offer assistance post repair for repairs carried out by a non dealership. Hence the reason I said get it towed to a Mazda Dealership.

 

Hi
I have a similar problem with my Mazda 6 2.2 diesal, got 83k on the clock, 2013. Did your fix solve the problem on Ur car, I'm just curious to find out how others have faired after clearing the oil strainer and hard carbon from the cylinder.

 

I too am having this low oil pressure problem. I just bought the car today from an auction conducted online. Wasn't able to view the car before the auction due to Covid restrictions, although I did request to view it. Drove the car a couple of miles down the road and the light came on.

It is a late 2014 plate CX-5 with just over 80k miles on the clock.

Wondering if I should change the oil first t see if that cures it, or should I just drop the sump and check the strainer.

Having code P055f:00-AE come up.

I checked the oil pressure at idle and it comes out around 120 kPa which is 17 - 18 psi.....any ideas where these engines should be?

 

From memory thats too low.

Official Mazda TSB t test for oil pressure is, Engine oil temperature above 95`c, Slowly rev it up to 4,000rpm, Oil pressure needs to be over 360kpa.

 

Thanks.

​​​​​​Dropped the sump off today and removed the sediment trap / filter. It was clogged. A lot of carbon build up. It has been done before and who ever did it last cut the bolt which made it a lot easier to remove thankfully.

Fingers crossed it wasn't like it for long.

Oil pressure is up at 180kpa on idle and over 400kpa when revved.

 

Im about to do this to my cx5, does cutting the bolt affect the pick up in anyway? Dont want to take oil pump off. Do you have any photos?