SES came on again, New DTC this time

Hi,
While cruising down I-75 Friday, SES illuminated.

This time the code is P02CE.

No idea what it actually translates to for a 2010 335d, but my scanner web site says

"Cylinder 2 fuel injector offset learning at minimum limit"

I realize the DTC meaning may be different from the generic list on the scanner web site,
sure would like to know what the code really means.

So I have been able to drive the car for 3 months before having to take it in again!!!

dieseldr

Originally Posted by dieseldr

This time the code is P02CE.

No idea what it actually translates to for a 2010 335d, but my scanner web site says

"Cylinder 2 fuel injector offset learning at minimum limit"

I realize the DTC meaning may be different from the generic list on the scanner web site,
sure would like to know what the code really means.

Because of small manufacturing differences, each injector has slightly different characteristics. The engine computer (DDE) maintains adaptation values for each injector that baseline the injectors' characteristics. This code is telling you that the injector is no longer able to be programmed correctly - I'm not sure if it means too lean or too rich.

It's possible that it can be cleaned (although piezo-electric injectors don't clean well), but I suspect you may have to have it changed out.

Thanks for the explanation!
Your signature photo looks like the time I drove up to Paradise ranger station one winter...

Originally Posted by dieseldr

Thanks for the explanation!
Your signature photo looks like the time I drove up to Paradise ranger station one winter...

Chinook Pass, on the East side of Mt. Rainier! May 9th this year.

I guess the car just does not like I-75....

While cruising down I-75 Sunday, SES illuminated.

The code is P02CE. Again. Fuel Injector #2. Again.

So either the dealer did not change it last time, as they reported, OR the remanufactured replacement injector failed after 10 weeks service.

I did get to drive the car 10 weeks since the last failure, a new record!

Try using injector cleaner

Sent from my SPH-L710 using Bimmer App

Update March 11 2013 -
Cruising down I-75 again (take the son to/from Gainesville often), SES again.
Pulled the code, injector #2 again.
Car idles rough.
Mileage dropping rapidly, probably injector leaking badly.
Third time to the dealer to fix the same thing.
Again.
Can't drive it for more than 3 or 4 months w/o a failure.
What a POS, I'll never own another BMW.
dieseldr

Did they replace the injector last time? Seems like a faulty part again- it is unlikely but possible. I don't see how the same injector would keep failing if it was replaced, unless their is an associated component causing it to prematurely fail. I don't know enough to know what that might be, unfortunately.

Originally Posted by OILPowered

Did they replace the injector last time? Seems like a faulty part.

According to his invoice from above they did replace the #2 injector. Makes me wonder though if they really did not do a good job in doing so.

Originally Posted by GreekboyD

According to his invoice from above they did replace the #2 injector. Makes me wonder though if they really did not do a good job in doing so.

I would expect BMW NA, who is paying the bills, is going to start wondering about the quality of the part replacement job pretty soon. I wonder how fragile/sensitive to handling those piezo injectors are, and if they are sensitive to over-torquing of any "hold-in" components). I suppose they could have a bad batch of injectors in the parts system...

Looks like they did what they were supposed to do. Odd.

This is the detail of that fault code.


4AE6 - P02CE
Information saved in DDE
Fault code 4AE6 - P02CE
Fault text:
DDE: Zero-quantity adaptation, injector, cylinder 2: permissible filtered activation duration correction too low

Fault description: Monitoring zero-quantity delivery rate adaptation.
The diagnostic trouble code is logged when the injector activation period at one of the 3 calibration points falls below the maximum activation duration and when the signal deviation at one of the 3 calibration points exceeds the signal limit.

Condition for fault identification: 1. Test condition: Monitoring proceeds in a 100 ms grid. Voltage condition: Monitoring proceeds in a 100 ms grid.

Condition for fault memory entry: Event debounced (1)

Action in service: Replace injector.

Fault effect and breakdown warning: -

Driver information: Warning light: MIL

Service instruction: none

I had this same fault for the 3th time. Injector #2 has been replaced 2 times. On the 3th time the dealer opened a PUMA case with BMWNA. According the SA, they loaded special diagnostic software on the car and the problem is communication between the various ECU, i.e. a software problem. Per BMW instruction (PUMA case), they cleared the fault codes and reprogrammed the car with the FSE to new level E89X-12-07-508. They did not replace the injector.

It has been 2 weeks and I did not get the code again. Time will tell.

Originally Posted by montr

I had this same fault for the 3th time. Injector #2 has been replaced 2 times. On the 3th time the dealer opened a PUMA case with BMWNA. According the SA, they loaded special diagnostic software on the car and the problem is communication between the various ECU, i.e. a software problem. Per BMW instruction (PUMA case), they cleared the fault codes and reprogrammed the car with the FSE to new level E89X-12-07-508. They did not replace the injector.

It has been 2 weeks and I did not get the code again. Time will tell.

Software fixes are much preferred IMO. Good luck!

Sent from my MB525 using Bimmer App

I went through a year of injector failures, rough idle and zero quantity adaptation faults and replaced several injectors multiple times. Last November my dealer opened a PUMA case with BMW engineering and they replaced the DDE.

For anyone who has repeat injector failures, I recommend asking your SA to open a PUMA case and ask about DDE failure.

Here is the status - agrees w/ previous comments - software......

It appears that when two of the computerized systems "DDE" "SCR" are not synchronized with respect to firmware patches and/or other configuration data, the SYMPTOM of this problem is to throw a code that says the #2 injector is having a problem.

The #2 injector is, in fact, fine, it is the software that is confused and asking "Hey -BMM Tech - help!!"

I noticed your mileage on the scan of the work sheet - might it be a good idea to consider a maintenance plan before you click over 50,000? Well, that is IF you're going to keep the car!