Peugeot 508 Jerking Acceleration Power Loss

I'm having a perplexing issue with my 2022 Peugeot 508 gasoline. At around 110799 km, the check engine light comes on sometimes, and the car jerks a lot when accelerating. There's also a strange whistling and loud hissing during acceleration, and sometimes the engine stalls at idle. I've noticed worse fuel consumption and less power. Could it be a bad boost pressure sensor? I think the cable or plug might be faulty.

4 comment(s)

I had similar symptoms in my 508, not sure of the year though. The jerking, whistling, and power loss make me think it's an air intake problem, maybe the turbocharger. Have you checked the intake manifold for cracks or loose connections? It could be the boost sensor, but have you measured the actual boost pressure compared to what it should be?

I haven't measured the boost pressure yet. How do I check the intake manifold connections and the turbo boost system? What tools do I need?

Given the symptoms, a faulty boost pressure sensor is likely. You could try to diagnose it yourself, but I'd recommend a professional workshop. You could misdiagnose it and damage something. It could take a while. Better to let someone experienced handle it.

Thanks for the advice. I took it to a Peugeot technician. The boost pressure sensor was the problem. The repair, including the sensor and labor, cost 95€.

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