P1200
Fuel Pump Relay/ECU Circuit Malfunction
Severity
🔴 HighCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)
Symptoms
- Engine won't start
- Floating idle speed
- Loss of engine power
- Stalling engine
- Check Engine Light Is On
Causes
- Faulty fuel pump relay
- Open or short circuit in control circuit
- Poor contact in connectors
- Power or grounding problems
- ECU malfunction
How to Fix
- Check the condition of the fuel pump relay
- Check the integrity of the relay control circuit
- Check connectors and contacts for oxidation
- Check circuit power and grounding
- If necessary, replace the relay or ECU