P1178
Fuel Pump Driver Control Module Sensor 1 Internal Supply Circuit
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)
Symptoms
- Problems starting the engine
- Unstable idling
- Loss of engine power
- Stalling engine
- Increased fuel consumption
Causes
- Malfunction of the fuel pump control module
- Open or short circuit in the power supply
- Bad contacts in connectors
- Problems with the fuel pump relay
- Malfunction of the fuel pump itself
How to Fix
- Check the integrity of the sensor power supply circuit
- Inspect connectors and contacts for oxidation
- Check the operation of the fuel pump relay
- Test the fuel pump control module
- If necessary, replace the control module