ReneWagnerFan

Mercedes GLK Diesel Fault Code and Power Loss

My 2010 Mercedes GLK diesel is throwing a fault code. The engine power is significantly reduced, and this error is now persistently stored. I suspect a prior chip tuning attempt by a third-party provider is the culprit. Has anyone experienced similar issues with aftermarket ECU modifications? I used an auto scanner and the dashboard light came on. I need some vehicle diagnostics.

4 comment(s)

Reduced power and a stored error? Sounds familiar. I had something similar happen on my old Ford Focus. Not a Mercedes, I know, but could be related. Do you get the engine issue frequently? I bought a cheap scan tool but it didn't help much.

Frequently? Yes, this engine issue is now constant. The dashboard light is always on and the reduced power never goes away. Which scan tool did you use? Was your problem also related to tuning?

Okay, constant problem is worse than what I had. Mine came and went for a while. I used some no-name thing from online, so I didn't expect too much. It wasn't the tuning for me, but a faulty sensor. Honestly, with it being constant, I would just take it to a workshop. They have better vehicle diagnostics equipment.

Understood. Thank you for the input. I had the ECU reflashed to the original factory settings. The garage confirmed the chip tuning corrupted the ECU software. Repair cost was 180€. The fault code is now gone, and the engine power is back to normal.

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