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GLC hybrid engine symptoms

My 2019 Mercedes GLC hybrid is showing some concerning symptoms. I'm experiencing reduced engine power, the check engine light is on, the engine runs roughly, and there's noticeable jerking during acceleration. The car has 231192 km on the clock. Could this be fuel starvation? My initial thought is a defective injection valve or injector, leading to the engine running too lean. Has anyone else encountered similar issues? Is there any way to diagnose this without specialized tools?

A 2019 Mercedes GLC hybrid is experiencing reduced engine power, a check engine light, rough running, and jerking during acceleration. The suspected cause is fuel starvation, potentially due to a defective injection valve or injector, leading to a lean engine condition. Suggestions include checking the air-fuel ratio, throttle body, and EGR valve for issues. Ultimately, the problem was confirmed to be faulty fuel injectors, which were replaced, resolving the symptoms.

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4 comment(s)

Those symptoms do sound familiar. I have a GLC as well. Has the air-fuel ratio been checked? A lean condition could definitely cause those problems. Have you considered inspecting the throttle body for any signs of buildup or damage? What about the EGR valve?

I haven't checked the air-fuel ratio directly, but could a dirty throttle body or faulty EGR valve really cause such a drastic loss of power and rough running? I was leaning more towards fuel injectors being the primary culprit. How would I check the EGR valve? I'm not sure what to look for.

It's possible, although fuel injectors are a likely suspect given those symptoms. I had a similar issue traced back to faulty fuel injectors causing a lean condition. Considering the mileage, it's not entirely unexpected. Visually inspect the EGR valve for carbon buildup or sticking. Given the complexity and potential for misdiagnosis leading to wasted time and money, might it be worth taking it to a workshop for proper diagnostics?

I appreciate the input. It's sounding like the injectors are the primary cause. I'll bring it to a shop. It was indeed the fuel injectors as suspected. Cost me 515€ to replace. Runs like new again.

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MERCEDES

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GLC