Pcm Code E055, TPS Out Of Adjustment: Description

TPS is self-adjusting. With ignition off, PCM executes a TPS 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. At that time, PCM stores TPS value and calculates a correction.

If same correction factor occurs on 2 consecutive key off cycles, TPS is corrected to zero degrees using correction factor learned. If value needs correction by more than -2.9 degrees or +3.0 degrees, PCM Code E055 will be stored in memory at next key on cycle. Parameter ED01 displays uncorrected TPS values.