Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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