Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The DTC indicates that the voltage is high when it should be low.
The cost to diagnose the P0812 1998 Ford F150 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
The Transmission Control Module (TCM) monitors the Reverse Switch Input signal. The TCM sets the OBDII code when the Reverse Switch Input is not to factory specifications.
Need more information on how to fix the P0812 1998 Ford F150 code? Get Access to Factory Service Manuals
Get the P0812 1998 Ford F150 code diagnosed by a professional: Find a repair shop in your area