P1220 – Fuel Metering Solenoid Circuit
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Symptoms
- Hard starting
- Rough idle
- Loss of power
- Hesitation
- Check engine light
Causes
- Open solenoid coil
- Shorted solenoid
- Wiring damage
- Connector corrosion
- ECU driver fault
Diagnosis
- Check solenoid resistance
- Inspect wiring
- Check power and ground
- Scope control signal
- Scan live data
Repair
- Replace metering solenoid
- Repair wiring
- Clean connectors
- Repair ECU driver
- Secure harness