vinkodex.
Fault code

P2005 fault code.

This code comes up with one known fault.

Generic code

Code type

Engine and drivetrain

System

Intake manifold swirl flaps stuck open, bank 2

Adjustable flaps in the intake manifold control how the air swirls in. The engine control unit measured that they do not close on bank 2. A bank is one side of a V engine, and the two sides give separate codes.

The code tells you what the control unit measured, not which part has failed. The same code has several possible causes.

Which known faults it comes up with

OM642 V6 diesel: the swirl flap and its plastic linkage break

critical

The swirl flaps sit in the intake of both cylinder banks, and a central electric actuator moves them through a linkage. Soot builds up on the linkage and on the flaps, the flap starts to bind, and in the end the plastic breaks. This is the most frequent single failure on this engine, and the broken pieces can get into the engine, which can lead to engine damage. The symptoms are the engine warning light, rough running and a lack of power, with the code P2004 or P2005 in the fault memory. The condition of the flaps can be seen with an endoscope through the intake, without dismantling. It is worth looking above 150,000 km, especially on the W164 ML320 and ML350 CDI. An aluminium repair kit is available for it, which lasts longer than the factory part.

above 100,000 km

What to check

  • Read the fault memory and look for the P2004 and P2005 codes
  • Ask whether the flaps have been inspected with an endoscope, because they are visible without dismantling
  • At low revs watch for a lack of power and rough running
2 more steps in the write-up

Information, not an expert opinion

We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.

  • A fault on the list does not mean the car you are looking at has it.
  • A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
  • You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.
Details in the terms