[bimmerup-sonny]

After CBU clean at 71K miles, at 77K miles my '11 335d started to throw bunch of Injector codes in a 3 week period.

P02D4 - Injector 5 – offset learning at minimum limit
after this code, the car stutters below 1000 RPM but not at idle
P02D1 - Cylinder 3 Fuel Injector Offset Learning At Max Limit
P20EE - SCR NOx Catalyst Efficiency Below Threshold

I've read that these are false injector codes, and have the indie perform the below recommended SW upgrades

===================
ISTA/P 3.54.3
- New I-levels for the E90 and E70 contain new DDE software to correct the zero-mass adaptation faults from occurring after intake carbon cleaning as described in SI B13 04 14.
Target I-levels=> E89X-14-11-501 and E070-14-11-501
Note: This requires the service function for the DDE incremental wheel adaptation reset to be performed after programming – this test plan is included in ISTA 3.47.10.

ISTA 3.47.10
-The Service Function for the E90 and E70 M57Y diesels to reset the incremental wheel adaptation after carbon cleaning is included.
Important:
The vehicles must first be updated using ISTA/P 3.54.3 (Target I-levels=> E89X-14-11-501 and E070-14-11-501) for this test plan to complete successfully, as all previous software versions do not support this function.
With these ISTA/P and ISTA version releases, IRAP sessions are no longer necessary for both issues.

At the same time, I decided to treat it with a double dosage of Power Service Diesel Kleen, the issue went away within 3 days.

But now at 83K miles, the same injector code came back and the engine stutters under 1000 RPM again

P02D4 - Injector 5 – offset learning at minimum limit

I am treating it with a double dosage of Power Service Diesel Kleen, 2 days now, will see. I normally dump in a normal dose of this Diesel Kleen every other tank.

Another indie thinks that there is water in the diesel I use (mostly from Shell)
and recommend another station, maybe I will try and stick with Chevron, who is known to have highest cetane level.

Has anyone experienced this issue? Or have any recommendations?

[pbdm4k]

Pretty much what happened to my car.

CBU cleaning, then after a few weeks the idle went to sh*t and the car was running rough.Upgraded the DDE software version and reset the fuel injectors, the car now idles very smoothly.

It's a possibility that your injectors are old and need replacing. These aren't your grand dad's fuel injectors. These piezo injectors are capable of altering the fuel quantity and number of times fuel is injected per combustion cycle. Injector cleaner may just be a bandaid solution. I found it helped my car idle smoother but it was temporary when the next tank of diesel didn't have any additives. The rough idle went away when I had the DDE upgraded and the injectors reset.

If the one injector keeps popping up, it may just be time for that injector to get replaced. Note that when you replace the injector, there is a code engraved on the top of the injector. That code needs to be put into the DDE after the injectors have been swapped so the DDE knows how to handle the new injector.

Unfortunately for me, injectors 3 and 4 are still showing way out of range and can't compensate resulting in a slight misfire around 2000rpm. Both injectors are going to be replaced and the DDE reset again. Hopefully it should be perfect after that. Of note, my car now has over 170000km (~105000 miles) on it.

Let us know how it works out with your car.

[taibanl]

Bg244.

I wouldn't Think that you have false codes given that you have actual performance issues

[ideloera]

sonny,

let your tank go down to about 1/4 and add in 2 bottles of Liqui Moly Diesel Purge.

[natefank]

I am having the same issue with cylinder 1, I replaced it and the issue is back within a week. How do you upgrade the DDE? Also how do you put the new injector code into the DDE?

[bimmerup-sonny]

Originally Posted by ideloera

sonny,

let your tank go down to about 1/4 and add in 2 bottles of Liqui Moly Diesel Purge.

I thought Diesel Purge is used by itself by by passing your fuel intake and run the engine with it to clean out all the deposits and not adding to fuel tank.

Do you mean Liqui Molly Super Diesel Additive or other Liqui Molly product?

[9mmkungfu]

Originally Posted by bimmerup-sonny

I thought Diesel Purge is used by itself by by passing your fuel intake and run the engine with it to clean out all the deposits and not adding to fuel tank.

Do you mean Liqui Molly Super Diesel Additive or other Liqui Molly product?

What you're describing sounds like Liqui Moly Diesel intake cleaner:

https://www.europaparts.com/liqui-mo...er-400-ml.html

Diesel Purge sounds like something that you add to the tank:

https://www.amazon.com/Liqui-Moly-20.../dp/B00CPL8OVE

[ideloera]

Originally Posted by bimmerup-sonny

I thought Diesel Purge is used by itself by by passing your fuel intake and run the engine with it to clean out all the deposits and not adding to fuel tank.

Do you mean Liqui Molly Super Diesel Additive or other Liqui Molly product?

Nope, I meant Liqui Moly Diesel Purge. I'll post a link below:

https://www.amazon.com/Liqui-Moly-20...y+diesel+purge

Add it in to your tank. I know some VW guys disconnect the fuel lines, dip them into the liqui moly diesel purge containers, and run the cars like that at different RPM. This cleans up the injectors pretty good. Adding diesel purge to a tank with just a bit of gas works well too.

[kydiesel35]

Ingredients in these additives appear to all be similar.

[bimmerup-sonny]

Originally Posted by ideloera

Nope, I meant Liqui Moly Diesel Purge. I'll post a link below:

https://www.amazon.com/Liqui-Moly-20...y+diesel+purge

Add it in to your tank. I know some VW guys disconnect the fuel lines, dip them into the liqui moly diesel purge containers, and run the cars like that at different RPM. This cleans up the injectors pretty good. Adding diesel purge to a tank with just a bit of gas works well too.

That's weird, the only Diesel Purge product on their website is this
http://www.liqui-moly.de/liquimoly/p...oiladb=web.nsf

And the video shows how to apply and it is exactly as you described here.
So it is safe to use as an fuel additive, right?

[ideloera]

Originally Posted by bimmerup-sonny

That's weird, the only Diesel Purge product on their website is this
http://www.liqui-moly.de/liquimoly/p...oiladb=web.nsf

And the video shows how to apply and it is exactly as you described here.
So it is safe to use as an fuel additive, right?

Yes, it is safe to add as a fuel additive. I have done it a few time, no issue whatsoever.

[bimmerup-sonny]

Originally Posted by ideloera

Nope, I meant Liqui Moly Diesel Purge. I'll post a link below:

https://www.amazon.com/Liqui-Moly-20...y+diesel+purge

Add it in to your tank. I know some VW guys disconnect the fuel lines, dip them into the liqui moly diesel purge containers, and run the cars like that at different RPM. This cleans up the injectors pretty good. Adding diesel purge to a tank with just a bit of gas works well too.

Did your car also experience the stuttering at low RPM and Liqui Moly fixed it?
I just bought some from Amazon and definitely will try it.

[kydiesel35]

Additives are to increase the quality of fuel. They won't fix mechanical problems. Band-aid.

[bimmerup-sonny]

Originally Posted by kydiesel35

Additives are to increase the quality of fuel. They won't fix mechanical problems. Band-aid.

If the issue was mainly fuel injector block from the diesel gunk, and these cleaners can do the cleaning then it will be great.

I do think, and I see many posts about the same issue too, that the CBU clean triggered these injector events, maybe from pushing some of these gunk down the injectors.

Has anyone ran into injector codes prior to CBU clean?

[9mmkungfu]

Yes, it's been covered in detail with several other threads. CBU can manifest itself as injector codes. I'd pop the intake off and take a look before replacing any injectors.

[CvilleBill]

Injectors can also be tested at a Bosch service center that works on diesels. I had all six from my junkyard motor tested. It was pretty cool, got a report on each injector, and they all passed.

[bimmerup-sonny]

Originally Posted by 9mmkungfu

Yes, it's been covered in detail with several other threads. CBU can manifest itself as injector codes. I'd pop the intake off and take a look before replacing any injectors.

My injector codes started to show up 6K miles AFTER CBU clean

[ideloera]

Originally Posted by bimmerup-sonny

Did your car also experience the stuttering at low RPM and Liqui Moly fixed it?
I just bought some from Amazon and definitely will try it.

About 2 seconds after starting the car I would experience the stutter and a few seconds later it would sort itself. After adding 2 cans of Diesel Purge when my gas tank was at about 1/4 and driving my car until almost empty, the stuttering stopped.

[9mmkungfu]

Originally Posted by bimmerup-sonny

My injector codes started to show up 6K miles AFTER CBU clean

Oh just saw that - got it. Did you do the software update? I haven't followed along.

Getting the car updated to the latest i-level is where I would start (seems the Indy shop suggests that).

[bimmerup-sonny]

Originally Posted by 9mmkungfu

Oh just saw that - got it. Did you do the software update? I haven't followed along.

Getting the car updated to the latest i-level is where I would start (seems the Indy shop suggests that).

I don't know about the latest ... but I had the indie shop does these:

ISTA/P 3.54.3
- New I-levels for the E90 and E70 contain new DDE software to correct the zero-mass adaptation faults from occurring after intake carbon cleaning as described in SI B13 04 14.
Target I-levels=> E89X-14-11-501 and E070-14-11-501
Note: This requires the service function for the DDE incremental wheel adaptation reset to be performed after programming – this test plan is included in ISTA 3.47.10.

ISTA 3.47.10
-The Service Function for the E90 and E70 M57Y diesels to reset the incremental wheel adaptation after carbon cleaning is included.
Important:
The vehicles must first be updated using ISTA/P 3.54.3 (Target I-levels=> E89X-14-11-501 and E070-14-11-501) for this test plan to complete successfully, as all previous software versions do not support this function.
With these ISTA/P and ISTA version releases, IRAP sessions are no longer necessary for both issues.