2003 Ford Expedition P0231 Fault: Fuel Pump Relay Issue and Vehicle Stalling Symptoms
I'm experiencing a P0231 diagnostic code on my 2003 Ford Expedition. The vehicle unexpectedly shuts off while driving, most recently during a road trip with my wife. After arriving at the destination, it started up immediately. However, when I drove it home, it began losing power—though I was able to keep it running by releasing the accelerator. Research indicates that P0230/P0231 codes are frequently linked to fuel pump relay issues. Could a faulty fuel pump relay cause intermittent stalling and loss of power? Any insights would be greatly appreciated. Unfortunately, I can't afford a dealership or shop visit right now. Thanks for any advice.
No other diagnostic codes are present—does your OBD2 scanner show all stored codes? Is there a remote starter installed? Several common troubleshooting steps involve checking the fuel pump relay with an ohmmeter. On a 15-year-old vehicle, replacing the relay might be a cost-effective fix compared to extensive diagnostics. However, one of these questions (remote starter or wiring) is likely the key factor.