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.
Electronic Throttle Control DTCS
/Performance Problem DTC P2122 APP Sensor A (Throttle Position Sensor D) Circuit Low Voltage DTC P2123 APP Sensor A (Throttle Position Sensor D) Circuit High Voltage DTC P2127 APP Sensor B (Throttle Position Sensor E) Circuit Low Voltage DTC P2128 APP Sensor B (Throttle Position Sensor E) Circuit High Voltage DTC P2135 TP Sensor A/B Voltage Incorrect Correlation DTC P2138 APP Sensor A/B Incorrect Voltage Correlation DTC P2176 Throttle Actuator Control System Idle Position Not Learned DTC P2552 Throttle Actuator Control Module Relay Malfunction DTC U0107 Lost Communication With Throttle Actuator Control Module
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.