V90 Knock Sensor Issue

I had a similar issue with my Opel Astra a while back. Check engine light, poor performance... turned out to be a faulty connection to the knock sensor. Have you checked for any corrosion or damage to the wires themselves?

Thanks! I'll take a closer look at the wiring. Where exactly should I be focusing my attention? Any specific areas that are prone to corrosion?

On my Astra, the corrosion was right where the connector plugs into the sensor itself. I'd suggest cleaning the contacts with electrical contact cleaner, but honestly, with those symptoms, you may need to take it to a workshop.

Thanks for the advice. Turns out the cable connection was indeed defective. The workshop replaced it and the sensor itself, came to 95€. Runs like a charm again!