P0334moderate severityPowertrain
Knock Sensor 2 Circuit Intermittent (Bank 2)
on 2000 Audi A6 2.7L Turbo V6 · AWD
What this code means
The bank 2 knock sensor signal is dropping out intermittently. The PCM may conservatively retard timing, reducing power.
Symptoms
- Intermittent power loss
- Occasional knock noise
- Check engine light flickers
Common causes
- Loose sensor connector
- Intermittent wiring
- Failing knock sensor
- Improper mounting torque
Diagnostic steps
- Wiggle-test bank 2 harness
- Inspect connector pins
- Scope sensor signal under load
- Verify sensor torque spec
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