[dixy2k]

Just got this fault code today.
Torque app can only say powertrain and nothing else.

I think the engine still pull strong, however there is something weird about the tranny. I can't say for sure but it seems as if it doesn't shift in a lower gear upon demand.

Any input?

[Brad335d]

4AF5 - P02D1

Information saved in
DDE

Fault code
4AF5 - P02D1

Fault text
DDE: Zero-quantity adaptation, injector, cylinder 3:
permissible filtered activation duration correction too high

Fault description
Monitoring zero delivery rate adaptation.
The diagnostic trouble code is logged when the corrected
injection activation period at one of the 3 calibration points
exceeds the maximum activation duration and when the
signal deviation at one of the 3 calibration points exceeds
the signal limit.

Condition for fault identification
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

© 2014 ALLDATA LLC. All rights reserved. Terms and Conditions

[Hoooper]

Didn't you already have a carbon cleanout? If not, you might be soon

[135i_vs_]

Or you need a new DDE...

[2deerwhistlers]

Originally Posted by dixy2k

Just got this fault code today.
Torque app can only say powertrain and nothing else.

I think the engine still pull strong, however there is something weird about the tranny. I can't say for sure but it seems as if it doesn't shift in a lower gear upon demand.

Any input?

Might not matter but has your car been tuned?

[dixy2k]

Originally Posted by Hoooper

Didn't you already have a carbon cleanout? If not, you might be soon

I had just about the whole exhaust system replaced. One turbo, EGR valve, EGR cooler, DPF, SCR, back pressure sensor.

[dixy2k]

Thanks Brad

I took the car at the dealer Friday afternoon. I was told they will get to it on Monday.
Meanwhile I drive a 535d loaner. I like it a lot. Seems to have less power than mine.


Currently my car lacks some power in the low RPM range, it wakes up around 3000 RPM.
I thought the first turbo was at fault again. The engine revs fast but there is a lack of (perceived) boost.

[dixy2k]

Originally Posted by 135i_vs_

Or you need a new DDE...

Why would the DDE go bad?

[dixy2k]

Originally Posted by 2deerwhistlers

Might not matter but has your car been tuned?

Yes.

[dixy2k]

I have used some fuel additives for the past 2 months. Mainly Diesel Kleen. I was hoping it would keep the injectors clean too.

[taibanl]

Originally Posted by dixy2k

Why would the DDE go bad?

Look at the part number revision history. You tell me.

[dixy2k]

You think the DDE is not able to monitor the injectors properly. Is this what you mean?

[Hoooper]

Originally Posted by dixy2k

You think the DDE is not able to monitor the injectors properly. Is this what you mean?

There is actually a tsb that blames the zero adaptation fault on a bad DDE. The situation listed in the tsb is very specific but to me it suggests there is/was a DDE issue. You wouldn't be the first one on here to have that fault because of a DDE.

[taibanl]

Originally Posted by Hoooper

There is actually a tsb that blames the zero adaptation fault on a bad DDE. The situation listed in the tsb is very specific but to me it suggests there is/was a DDE issue. You wouldn't be the first one on here to have that fault because of a DDE.

As I've posted before, the e90 US 335d (DDE7 vs EU DDE6) has gone through no fewer than NINE part numbers since product introduction! It is quite clear they are having some unspecified QC issue with it.

[Mark M]

My DDE was replaced due to zero quantity adaption errors. So were many others on here.

[dixy2k]

Originally Posted by Hoooper

There is actually a tsb that blames the zero adaptation fault on a bad DDE. The situation listed in the tsb is very specific but to me it suggests there is/was a DDE issue. You wouldn't be the first one on here to have that fault because of a DDE.

I had the DDE software rewritten twice (I think, once for sure) by the dealer in the past.

Is it still not enough for some of those issues? Doe the whole thing need to be replaced?

BTW, it's the end of the day now and the dealer hasn't called yet.

[Hoooper]

Originally Posted by dixy2k

I had the DDE software rewritten twice (I think, once for sure) by the dealer in the past.

Is it still not enough for some of those issues? Doe the whole thing need to be replaced?

BTW, it's the end of the day now and the dealer hasn't called yet.

I think its a hardware issue. The TSB advises replacement of the DDE rather than a reflash

[dixy2k]

Next time I talk to them, I will mention that.

I imagine I have to pay for it, right? My car is out of warranty. Or is the TSB is some kind of "recall"?

[floydarogers]

Originally Posted by dixy2k

Next time I talk to them, I will mention that.

I imagine I have to pay for it, right? My car is out of warranty. Or is the TSB is some kind of "recall"?

The DDE is covered by the Federal 8/80k emissions warranty; you might get lucky.

[dixy2k]

thanks

[dixy2k]

Got a call back from the dealer.

Apparently they will replace all injectors under emission warranty, but there is one more thing bad with it.
The DEF module has gone bad and it cannot read properly the amount of liquid inside the tank, the SA also said it cannot read the amount of fuel inside the tank (I know this is just huge BS).
The cost of replacing the module is about $700, not covered under warranty.

[dixy2k]

Why wouldn't the DEF related part be covered by the emission warranty?