P1178
Fuel Pump Driver Control Module Sensor 1 Internal Supply Circuit
P1178 is an OBD-II diagnostic trouble code meaning: Fuel Pump Driver Control Module Sensor 1 Internal Supply Circuit. Common causes: malfunction of the fuel pump control module, open or short circuit in the power supply. Estimated repair cost: $33–111.
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
Related codes
Error P1178 by Vehicle Brand
FAQ
What does the P1178 code mean?
P1178 is an OBD-II diagnostic trouble code that indicates: Fuel Pump Driver Control Module Sensor 1 Internal Supply Circuit
What causes a P1178 error code?
The most common causes of P1178 include: 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.
How do I fix a P1178 diagnostic trouble code?
To fix P1178: Check the integrity of the sensor power supply circuit. Inspect connectors and contacts for oxidation. Check the operation of the fuel pump relay. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1178?
Limited driving only, diagnose soon
How much does it cost to fix P1178?
The estimated repair cost for P1178 is $33–111. Actual cost depends on your vehicle, location, and labor rates.
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