Open circuit in the main control-module power relay control.
SYMPTOMS
- Check-engine light
- Stalling
- No-start
- Intermittent power loss
LIKELY CAUSES
- Faulty main relay
- Open wiring
- Corroded connector
DIAGNOSIS STEPS
- Test the main power relay
- Check the relay control circuit
- Inspect power and grounds to the module
RELATED PARTS
- Main relay
- Engine control module (DME)