Code P055, Closed TP Sensor Out Of Range: Notes

TP sensor is self-adjusting. With ignition off, PCM executes a TP sensor learning routine. After ignition is turned off, PCM will retract ISC until ISC throttle switch opens and throttle linkage is resting on minimum air screw. PCM then stores TP sensor value and calculates a correction.

If same correction factor occurs on 2 consecutive key off cycles, TP sensor is corrected to zero degrees using correction factor learned. If value needs correction by greater than 6.5 degrees, Code P055 will be stored in memory at next key on cycle. Parameter PD01 displays incorrect TP sensor values.