P0489moderate severityPowertrain
EGR Control Circuit Low
on 2009 Volkswagen CC 3.6L V6 · AWD
What this code means
The PCM has detected a low voltage condition in the EGR control circuit. This may prevent the EGR valve from operating properly.
Symptoms
- Check engine light on
- Rough idle
- Increased NOx emissions
Common causes
- Short to ground in wiring
- Faulty EGR valve
- Damaged connector
- Faulty PCM
Diagnostic steps
- Scan for stored codes
- Check EGR control circuit voltage
- Inspect wiring for shorts
- Test EGR valve operation
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