P0117 Diagnostic Code on 1996 Ford Ranger: Causes and Fixes for Engine Coolant Temperature Circuit Low Input

Model: Ford Ranger Fault Code: P0117 Posted: 2005-10-20 11:25

My 1996 Ford Ranger failed its vehicle inspection due to the P0117 diagnostic code, which indicates a 'Low Input' in the Engine Coolant Temperature (ECT) sensor circuit. I took it to a local service center, and they reset the code, stating it was only in the history log and not active. However, when I attempted to re-inspect the vehicle, the P0117 code reappeared and caused the failure. I'm unable to find any clear 'how-to' guides for diagnosing or fixing this issue on my model year. What exactly does P0117 mean in a 1996 Ford Ranger? How can I properly resolve this problem? Any technical insights or troubleshooting steps would be greatly appreciated.