P0489
PowertrainEgr Systemmoderate severityEGR Control Circuit Low
What P0489 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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✓ Autel official store
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