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moritzeule1
DS5 rough idle knock sensor
4 comment(s)
moritzeule1 (Author)
Yeah, I did give the contacts a once-over with some contact cleaner, but maybe I wasn't thorough enough. Was your issue definitely the knock sensor, and what exactly was wrong with it? Was it just a bad connection, or did you have to replace the sensor itself?
marcghost1
For me it was the connection, the plug was defective. I'd take it to a workshop to have them check. You don't want to risk damaging your engine with incorrect ignition timing.
moritzeule1 (Author)
I appreciate the advice. It ended up being a corroded connector on the knock sensor wiring, just like you suspected. New connector and a bit of cleaning and she's running like a dream now. Grand total: 95€! Check engine light is gone and the mileage is back to normal. Cheers!
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marcghost1
I had a similar issue with my DS5. Check engine light, rough idling, the whole shebang. I'd double-check that knock sensor wiring. It can be tricky. Have you tried cleaning the contacts?