P0329moderate severityPowertrain
Knock Sensor 1 Circuit Intermittent (Bank 1 or Single Sensor)
on 2014 Audi Q7 3.0L Supercharged V6 · AWD
What this code means
The knock sensor signal on bank 1 is dropping out intermittently. The PCM may retard timing as a precaution, reducing performance.
Symptoms
- Intermittent power loss
- Occasional knocking sound
- Check engine light flickers
Common causes
- Loose knock sensor connector
- Intermittent wiring fault
- Failing knock sensor
- Improper sensor torque
Diagnostic steps
- Wiggle-test sensor harness
- Inspect connector for corrosion
- Scope sensor signal under load
- Verify correct sensor mounting torque
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