P0660low severityPowertrain
Intake Manifold Tuning Valve Control Circuit/Open Bank 1
on 2002 Audi A6 3.0L V6 · AWD
What this code means
The PCM detected an open in the intake manifold tuning valve control circuit on bank 1. This valve adjusts intake runner length for optimal airflow.
Symptoms
- Check engine light on
- Reduced power at certain RPM
- Rough running
Common causes
- Faulty tuning valve solenoid
- Open or shorted wiring
- Corroded connector
- Faulty PCM
Diagnostic steps
- Scan for codes
- Inspect tuning valve wiring and connector
- Test solenoid resistance
- Check control circuit for continuity
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