2000 Ford Taurus Check Engine Light On: Error Code 1237 - Fuel Pump Secondary Circuit Fault Diagnosis and Repair
I own a 2000 Ford Taurus that runs smoothly under normal conditions, but the check engine light has been on for some time. The vehicle is displaying error code 1237, which indicates a fuel pump secondary circuit fault. I'm looking for clear information about what this error means and how to properly diagnose and repair it. Can anyone provide guidance on possible causes and solutions?
To troubleshoot error code 1237 in a 2000 Ford Taurus, check for voltage at the fuel pump's white red wire. While the fuel pump itself is the most common cause, the issue could also stem from the fuel pump driver module or an inertia switch. A proper voltage test can help determine whether the problem lies in the wiring, the pump, or another component.