lilianfuchs1

AMG GT Hybrid check engine light and rough engine

Has anyone experienced check engine light and rough engine in a 2023 Mercedes AMG GT Hybrid with 165228 km? The engine runs rough, especially at idle, sometimes stalling. Acceleration feels jerky with reduced power. A local mechanic suggested a mixture preparation error, possibly a defective fuel injector. Could it be related to the air-fuel ratio, throttle body, or mass airflow sensor?

4 comment(s)

That sounds rough! I had a similar issue with my AMG GT, though mine wasn't the hybrid. Check engine light flashing, the whole shebang. Was your mechanic able to narrow down which injector is causing the problem? Did they check the spark plugs while they were at it?

They didn't specify which injector was the issue, just that it could be the injector, and I don't think they checked the spark plugs. When you had the issue, was it definitely the injectors, or could it have been something else causing a similar problem?

Yeah, mine was definitely the injectors. Had the same symptoms - rough idling, loss of power, the works. Honestly, with those kinds of symptoms and the mileage you're at, I'd say it's worth getting a proper diagnostic done, especially if they suspect the injectors. If it is the injectors, just bite the bullet and get them replaced. Will cost you around 515€ but it'll save you headaches down the line. Don't want to mess around with the air-fuel ratio on these cars, you know?

Thanks a bunch for the advice! I took it to a specialist, and you were right – it was a faulty fuel injector. They replaced it, and now it's running like new. Cost me around 515€, just like you said. Appreciate the help!

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