E53 X5 3.0D 4B10/51 - Engine-roughness regulator

[H|TM@N]

Anybody have any idea what this code mean? It's an M57D30N. I suspect that it is a faulty injector or two.
The error code from BMW Scanner:
DDE*  ->  4B10/51 - Engine-roughness regulator
If I Google error code 4B10, I get the following description: Smooth Running Regulation - Correction Quantity too High.
I have ordered an INPA /ediabas K+CAN K+DCAN USB OBD2 cable to get more clarity on the fault.

The symptoms are as follows.
A lot of diesel smoke at start up in the morning, much more than usual.
Lumpy idle
"knocking" when you pull away from standstill
It seems as though the fuel consumption has also gone up
It still seems to perform as normal while driving at speed.

Let's see once I get my new cable.

BTW, I have already changed the Oil separator.

 

[ChefDJ]

Does the DDE light display on the dash?

Have you ever replaced the low pressure fuel pump?

 

[H|TM@N]

No DDE light on the dash.
Never replaced the low pressure fuel pump.

 

[ChefDJ]

Is there anything else to suspect a fuel supply issue?

 

[H|TM@N]

Is there anything else to suspect a fuel supply issue?

No, because I've had a fuel supply issue in the past and the symptoms were completely different and the car would go into limp mode due to low pressure in the fuel injection system.

 

[ChefDJ]

My old 530d had similar symptoms but would misfire, not knock on pull-away. Never went into limp mode. It turned out to be the low pressure fuel pump whcih I replaced and all was fine.

Hope you come right.

 

[H|TM@N]

Misfire under load or just whilst idling? The BMWScanner usually picks up fuel pressure issues, but this doesn't seem to be fuel pressure related. It seems to me that it might be a faulty/dirty injector or two. The car still pulls like it used to, the idling is just lumpy at times.

 

[ChefDJ]

Would misfire as soon as I accelerated, and then continue to misfire either while idling or driving.

No scanners/diagnostics picked up the fuel issue on my car either. The DDE light was displaying. First the high pressure pump was replaced, then the fuel pressure sensor, then the injectors were sent for testing, and finally the low pressure pump which resolved the issue.

 

[devlana]

+1 leaking injector

 

[H|TM@N]

+1 leaking injector

That's my thoughts exactly.

 

[H|TM@N]

Seems like the injector in cylinder 2 is the culprit.

Sent from my iPhone using Tapatalk

 

[H|TM@N]

I have replaced the injector on cylinder 2 this morning, and all is sorted. Fuel consumption has also returned to normal.

 

[ChefDJ]

:clapper: