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.
2012 Acura TL BaseFACTORY OEM SERVICE PROCEDURE
Electronic Throttle Control System
- Component Location Index
- DTC Troubleshooting
- DTC P0122: TP Sensor A Circuit Low Voltage
- DTC P0123: TP Sensor A Circuit High Voltage
- DTC P0222: TP Sensor B Circuit Low Voltage
- DTC P0223: TP Sensor B Circuit High Voltage
- DTC P1658: ETCS Control Relay ON Malfunction
- DTC P1659: ETCS Control Relay OFF Malfunction
- DTC P1683: Throttle Valve Default Position Spring Performance Problem
- DTC P1684: Throttle Valve Return Spring Performance Problem
- DTC P2101: ETCS Malfunction
- DTC P2118: Throttle Actuator Current Range/Performance Problem
- DTC P2122: APP Sensor A (TP Sensor D) Circuit Low Voltage
- DTC P2123: APP Sensor A (TP Sensor D) Circuit High Voltage
- DTC P2127: APP Sensor B (TP Sensor E) Circuit Low Voltage
- DTC P2128: APP Sensor B (TP Sensor E) Circuit High Voltage
- DTC P2135: TP Sensor A/B Incorrect Voltage Correlation
- DTC P2138: APP Sensor A/B (TP Sensor D/E) Incorrect Voltage Correlation
- DTC P2176: Throttle Actuator Control System Idle Position Not Learned
- APP Sensor Signal Inspection
- Accelerator Pedal Module Removal and Installation
Factory Service Tools
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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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