Open circuit on a sensor 5V reference supply from the control module.
SYMPTOMS
- Check-engine light
- Multiple sensor codes
- Drivability issues
LIKELY CAUSES
- Short or open on the reference circuit
- Shorted sensor pulling the reference down
- Module fault
DIAGNOSIS STEPS
- Identify sensors sharing the reference
- Check the reference circuit for shorts/opens
- Disconnect sensors to isolate
RELATED PARTS
- Wiring harness