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 System
/Performance Problem DTC P2122 APP Sensor A (Throttle Position Sensor D) Circuit Low Voltage (2004-2005 models) DTC P2122 APP Sensor A (Throttle Position Sensor D) Circuit Low Voltage (2006 model) DTC P2123 APP Sensor A (Throttle Position Sensor D) Circuit High Voltage (2004-2005 models) DTC P2123 APP Sensor A (Throttle Position Sensor D) Circuit High Voltage (2006 model) DTC P2127 APP Sensor B (Throttle Position Sensor E) Circuit Low Voltage (2004-2005 models) DTC P2127 APP Sensor B (Throttle Position Sensor E) Circuit Low Voltage (2006 model) DTC P2128 APP Sensor B (Throttle Position Sensor E) Circuit High Voltage (2004-2005 models) DTC P2128 APP Sensor B (Throttle Position Sensor E) Circuit High Voltage (2006 model) DTC P2135 TP Sensor A/B Voltage Incorrect Correlation DTC P2138 APP Sensor A/B (Throttle Position Sensor D/E) Incorrect Voltage Correlation DTC P2176 Throttle Actuator Control System Idle Position Not Learned DTC P2552 Throttle Actuator Control Module Relay Malfunction (2004-2005 models) DTC P2552 Throttle Actuator Control Module Relay Malfunction (2006 model) DTC U0107 Lost Communication With Throttle Actuator Control Module (2004-2005 models) DTC U0107 Lost Communication With Throttle Actuator Control Module (2006 model)
Use the Manual With the Right Hardware
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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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