Peugeot iOn throttle issue

I had a similar problem with my iOn. The symptoms you describe sound familiar. Have you noticed any issues with engine idling, or any unusual delays when you press the accelerator? Also, what's your mileage?

Yeah, now that you mention it, the engine idling seems a bit rough sometimes, almost like it wants to stall. And there's definitely a lag when I step on the gas, like the car's thinking about it before it actually goes. I'm at 116459 km. Does that match your experience?

Yes, the mileage is not far from when the accelerator pedal module failed in my iOn. Based on your description, it's highly likely the accelerator pedal module or the electronics inside are defective, leading to the reduced power and check engine light. I'd suggest taking it to a workshop to get it properly diagnosed, but be prepared for a potential replacement.

I took it to a workshop, and you were spot on - throttle valve defective! Repair cost was 265€. At least now it's sorted.