Peugeot 5008 knock sensor issue

Greetings. I have a 5008 as well and recall encountering similar symptoms. The illumination of the check engine light, coupled with diminished fuel efficiency and erratic idling, does indeed suggest a potential issue with the knock sensor. Have you by any chance inspected the wiring harness and connector leading to the knock sensor for any signs of physical damage or corrosion?

Thanks for the quick reply! I did take a peek, but honestly, I'm not 100% sure what I'm looking for. Is there anything specific I should be checking for besides obvious breaks or corrosion? Anything that might point to a definitive connection problem?

While a visual inspection is a prudent initial step, subtle anomalies may elude the untrained eye. In my professional opinion, it would be advisable to entrust your vehicle to a certified automotive technician for a comprehensive diagnostic assessment. Defective wiring and connection plugs can often trigger such errors, and a workshop can perform advanced diagnostic procedures. Replacing the defective component (knock sensor) cost me around 95€.

Okay, thanks a lot for the advice. I suspected as much. I'll take it to the shop and have them run a proper diagnostic. Hopefully, it's just a connection issue like we suspected. I appreciate the help!