P1264 – Fuel Quantity Adjuster Circuit
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Symptoms
- Rough idle
- Hesitation
- Loss of power
- Hard starting
- Check engine light
Causes
- Open adjuster coil
- Shorted coil
- Wiring damage
- Connector corrosion
- Control module driver fault
Diagnosis
- Check adjuster resistance
- Inspect wiring
- Check power and ground
- Inspect connector
- Scan live data
Repair
- Replace quantity adjuster
- Repair wiring
- Clean connectors
- Repair control module driver
- Secure harness