Jump to content
Russ_T

A ton of fault codes

Recommended Posts

Heya,

 

Picked up my 2015 530D estate on Saturday, no warnings on dash or fault codes. Went for a remap last night and the diagnostics tool gave the following:


 

 

28EC00 Exhaust gas pressure sensor before turbocharger, plausibility exhaust gas pressure before turbocharger not plausible to ambient pressure on overrun.


2AB600 Exhaust back pressure sensor before turbocharger, plausibility: pressure upstream from turbine too high (not plausible in relation to charging pressure and ambient pressure).


290900 Air system, air to EGR air mass flow: Plausibility measured air mass compared with calculated air mass too high.

 

25C800 Exhaust back pressure sensor, sensor drift outside tolerance.

 

245700 Particulate filter system, particulate filter subject to high load exhaust back pressure high)

 

287500 Lambda Oxygen Concentration implausibly low

 



Rang BMW and apparently there's no EGR recall on it. So it's now off to the independent specialist for a look at it but he's booked out for the next 3 weeks. 

I'm pretty handy and the car is running fine (at the moment). I imagine just swapping out sensors is 50:50 if it'll fix it.

Any ideas what this selection of codes could be please? Car has done 70k with full service history.

 

Cheers
 

Share this post


Link to post
Share on other sites

Looks like DPF is perhaps blocked, force a regen or drive it long enough and fast enough for it to do a regen.

 

Although given its age and mileage it shouldn't be a DPF issue, which ties in with no warnings.

 

If you can clear them then take on a long run  and see if they re-appear.

Share this post


Link to post
Share on other sites

Cheers. I do 80 miles each way to work and back, but maybe it had short journeys before that.

Will try clearing them and see what the deal is afterwards.

Share this post


Link to post
Share on other sites

Hmmmm, seems an o2 sensor in the exhaust has probably failed.

As that has failed it's not been doing a regen, and so the DPF is pretty full.

I've paid for a DPF clean down, which will last up to a couple thousand miles apparently, whilst I get it booked in for a new sensor, full clean down, and whatever else is wrong with it.

 

Why on earth the on board computer doesn't tell you about this fault I don't know.

 

Cheers

Share this post


Link to post
Share on other sites
28 minutes ago, marquisofraspberry said:

So the car was perfectly OK, then you took it for a remap and then all of a sudden you get lots of errors? I wonder what would happen if you reversed the map and took it back to standard?

 

I took from the OP that fault codes were read before you applied the map.  Like anything on a car before you start altering things you check for fault codes first, but perhaps you are right.

 

Were the faults found before or after the map was applied?

Share this post


Link to post
Share on other sites

The faults were part of the pre-check, and as it had faults the tuner wouldn't have done it, even if I begged him. He also has a 530D F11 and was surprised.

 

Luckily I had decided on a remap, otherwise I would have been driving oblivious to the fact I was nuking the DPF.

 

I'll take it for a 5th gear motorway blast tonight, and see if the faults return and what the deal is. Mostly posting my story here in case it helps someone searching these codes in the future.

 

Now everyone in my office with a BMW wants their car codes read by me on Monday in case they're in the same boat lol.

Cheers

Share this post


Link to post
Share on other sites

Just to report back for future searchers:

My EGR cooler had split / cracked and was leaking when smoke tested.

BMW were ace and replaced it for free, even though my model "wasn't covered" -  a 2015 F11 530D. They also replaced a sensor that had died because of it.

I just got 48mpg, a new record for me, at about 75mph.

 

I have two other faults to solve, but those codes were down to the EGR cooler common fault.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×