P2163: Throttle/Pedal Position Sensor A Maximum Stop Performance

What does P2163 mean?

P2163 concerns position signal A at the upper end of its travel: with the throttle or pedal resting on its maximum mechanical stop, the reading or the learned full-open value lies outside the band the calibration accepts. On Ford layouts A is the first throttle body sensor, while D to F belong to the pedal. Ford lists P2163 for the 2014 Boss 302S with MIL and wrench lamp. A Visteon patent shows the idea: the motor presses the plate onto its fully open stop for about 60 ms, the sensor value is stored, and a learned stop outside roughly 80 to 110 degrees is reported as a failure. Carbon, a bent stop or a worn sensor track are typical causes. P2109 is the matching closed-stop check; P2164-P2168 test the other letters. Reduced power is possible.

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

Symptoms

• Check engine and throttle warning lamps on
• Engine does not reach full power
• Limp mode with limited throttle opening

Common causes

• High Carbon or a bent stop keeps the plate from reaching full opening
• Medium Sensor A track worn at the full-open end
• Medium Replacement throttle body not matching or not relearned
• Low Contact resistance in the sensor connector shifting the signal

Likelihood is a general estimate across vehicles; your make and model may differ.