P1223 – Fuel Cutoff Solenoid Stuck
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Symptoms
- No start
- Engine stalls
- Intermittent running
- Loss of power
- Check engine light
Causes
- Mechanical sticking
- Contamination
- Internal solenoid wear
- Low voltage supply
- ECU control issue
Diagnosis
- Command solenoid on and off
- Listen for operation
- Check voltage supply
- Inspect for contamination
- Scan live data
Repair
- Replace cutoff solenoid
- Clean fuel system
- Repair wiring
- Improve power and ground
- Update ECU software