P0650 – Malfunction Indicator Lamp (MIL) Control Circuit
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Symptoms
- No check engine light
- Intermittent MIL
- Rough idle
- Poor acceleration
- Failed emissions test
Causes
- Faulty MIL bulb
- Damaged wiring
- Loose connector
- ECU issue
- Cluster issue
Diagnosis
- Inspect wiring
- Check MIL bulb
- Test cluster
- Scan live data
- Inspect connectors
Repair
- Replace MIL bulb
- Repair wiring
- Fix connectors
- Replace cluster
- Update ECU