OBD-II Generic Error Code P0231: How to Fix It

Q: What causes OBD-II error code P0231?

Code P0231 is typically caused by a faulty fuel pump relay, blown fuel pump fuse, damaged wiring in the fuel pump circuit, poor electrical connections, or a failing fuel pump that's drawing too much current.

Q: Can I drive with error code P0231?

It's not recommended to drive with P0231 as it indicates fuel pump circuit problems that can lead to sudden engine stalling or failure to start. This creates a safety hazard, especially in traffic or on highways.

Q: How much does it cost to fix P0231?

Repair costs vary widely depending on the root cause. A simple relay replacement costs $15-30, while fuel pump replacement can range from $400-800 including labor. Wiring repairs typically cost $100-300.

Q: Will P0231 cause my car to not start?

Yes, P0231 can prevent your vehicle from starting if the fuel pump isn't receiving adequate power to operate. The engine may crank but won't start due to insufficient fuel pressure.

Q: How do I prevent P0231 from happening again?

Regular maintenance helps prevent P0231 by keeping fuel system components clean. Replace fuel filters as recommended, use quality fuel, and address electrical issues promptly. Avoid running the fuel tank extremely low as this can damage the fuel pump.

Abstract

OBD-II error code P0231 indicates that your vehicle's fuel pump secondary circuit has low voltage or current. This means the fuel pump relay or control circuit isn't providing enough power to operate the fuel pump properly. If left unaddressed, this can cause poor engine performance, stalling, or complete engine failure.