Knock sensors
â–¶ How to fix
- Check plug connection knock sensor 4 - Check lines knock sensor 4 - Renew knock sensor 4
What you'll see
No driver-visible symptom recorded.
System reaction
- Engine is in use with a security-offset of the ignition angle in order to not destroy the engine with knocking combustion - Possible exhaust degradation and hightened temperatures in the cat and turbo charger - Engine runs bad - Torque is limited
Diagnostic depth
Detection
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Possible cause
- Short circuit to battery of knock sensor 4, line A