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helmutberger1

GLE diesel engine check engine light issue

My Mercedes GLE built in 2022 with a diesel engine is giving me headaches The check engine light is on, and I'm getting an error in the memory I suspect the oxygen sensor is aged, because I see higher fuel consumption Could a defective cable or plug connection be the culprit

Summary of the thread

A 2022 Mercedes GLE with a diesel engine had a check engine light issue, suspected to be due to an aged oxygen sensor, as indicated by higher fuel consumption. A faulty cable or plug connection was considered a possible cause. After professional diagnosis, it was confirmed that a faulty connection to the oxygen sensor was the problem, which was repaired, resolving the issue.

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4 comment(s)

fabian_moeller7

I had a similar issue with my GLE Check engine light illuminated, and fuel efficiency took a nosedive An automotive sensor related to the catalytic converter was faulty Have you checked the air-fuel ratio A bad connection could definitely be the problem

helmutberger1 (community.author)

Interesting How did you pinpoint the faulty sensor Was it obvious, or did you need special tools to diagnose it

fabian_moeller7

It wasn't obvious My mechanic used a diagnostic tool to read the sensor data The readings were erratic, indicating a problem Given your symptoms, I'd suggest getting it checked professionally Better safe than sorry with these complex systems

helmutberger1 (community.author)

Thanks a lot for the advice I took it to a workshop, and you were right – it was indeed a faulty connection to the oxygen sensor Repair cost was 95€, and now everything is working smoothly again

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MERCEDES

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GLE