AMG GT Hybrid Engine Stalling and Power Loss

My 2021 Mercedes AMG GT hybrid is acting up. The check engine light came on, and the engine sometimes stalls. It feels like it's lost power, and fuel economy is terrible. I'm at 86387 km. Any ideas? Maybe a bad fuel regulator?

4 comment(s)

Check the high-pressure fuel pump. I had similar symptoms on my older BMW 5 series, different engine of course, and that was the problem. Reduced engine power, rough idling. Does it feel like it's struggling for fuel?

Yeah, it really does feel starved for fuel sometimes. Could the high-pressure pump failing also cause the check engine light? Can this damage the engine if I don't get it fixed immediately?

The check engine light is normal when there's a fuel delivery issue. The ECU detects the problem and throws a code. Running lean for too long isn't good. Get it checked out soon. My BMW had a faulty high pressure pump as the root cause. It won't be cheap.

Thanks for the advice! I took it to my mechanic, and you nailed it – the high-pressure fuel pump was defective. They're replacing it now, costing around 1510€. Hopefully, this fixes everything. I appreciate the help!

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