Starter Relay A Stuck On
The first starter relay stays closed when commanded off. Starter motor remains engaged after the engine is running, which can destroy the starter pinion or ring gear.
Affected components
- Starter relay a
- Starter motor
Common causes
- High likelihood: Relay contacts welded shut by inrush current
- Medium likelihood: ECU output driver stuck on
- Low likelihood: Carbon or debris buildup preventing free movement
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.