P1212 – Fuel Pump Relay Control Fault
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Symptoms
- No start
- Intermittent stalling
- Long crank time
- Loss of power
- Check engine light
Causes
- Faulty fuel pump relay
- Corroded relay contacts
- Wiring issue
- Poor ground
- ECU driver fault
Diagnosis
- Check relay operation
- Inspect relay socket
- Check power and ground
- Load test circuit
- Scan for related codes
Repair
- Replace fuel pump relay
- Repair wiring
- Clean or repair grounds
- Repair ECU driver
- Secure connectors