ida_fuchs1
Twingo knock sensor issue
4 comment(s)
ida_fuchs1 (Author)
How do I check the wiring harness continuity? What points or resistance values should I check?
oskarscholz85
Continuity testing might reveal a broken wire, but pinpointing the exact issue without diagnostic tools is hard. Given your symptoms, the knock sensor or its connection is suspect. Consult a qualified mechanic, these sensors are fragile and hard to reach.
ida_fuchs1 (Author)
I booked a certified technician. It was a defective knock sensor connection. Replacement cost 95€.
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oskarscholz85
A faulty knock sensor can cause those symptoms. The ECU uses it to adjust ignition timing, so incorrect readings lead to poor performance and the check engine light. Before replacing the sensor, make sure the wiring and connector are in good condition. Don't just look, test the wiring harness continuity.