Opel Insignia hesitates during acceleration and the check engine light is on.

Hello everyone, I have a 2016 Opel Insignia with a gasoline engine and 156250 km mileage. I'm experiencing rough running when accelerating, the check engine light is on, and the engine is running roughly. I've already replaced the lambda sensor bank 2, the mass airflow sensor, the high-pressure pump, and the spark plugs, but nothing has helped. The error code shows a delayed reaction of the lambda sensor with a rich-to-lean sensor 2. Does anyone have an idea what the problem could be or how I can fix it? Thank you very much in advance for your help!

(Translated from German)

3 comment(s)

Check for any vacuum leaks in the intake system, as they can cause rough running and affect the air-fuel mixture, leading to the issues you're experiencing. Inspect hoses and connections for any cracks or disconnections. Let me know if you find anything or if you have further questions!

Opel Insignia misfires, runs at 2/3 power all the time. Replaced ignition coil, something that gave different values front to back, head gasket doesn't leak, really on the verge of despair

(Translated from Finnish)

Quotation:
@Nooppeli wrote on
Opel Insignia misfires, runs at 2/3 power all the time. Replaced ignition coil, something that gave different values front to back, head gasket doesn't leak, really on the verge of despair

Inspect the fuel injectors for any clogs or malfunctions, as they can cause misfires and reduced engine power. Consider using a fuel injector cleaner or having them professionally cleaned. Let me know if this helps or if you have any other questions!

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