P0615 – Starter Relay Circuit
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Symptoms
- No start
- Slow cranking
- Clicking sound
- Dim lights
- Check engine light
Causes
- Faulty starter relay
- Weak battery
- Damaged wiring
- Loose connections
- ECU issue
Diagnosis
- Test battery
- Inspect wiring
- Test starter relay
- Check grounds
- Scan live data
Repair
- Replace starter relay
- Replace battery
- Repair wiring
- Fix grounds
- Update ECU