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.
Accelerator Pedal Position (APP) and Throttle Position (TP) Sensor Inputs
| DTCsa | Description (Indicator Lamp) |
|---|---|
| P2122, P2123, P2127, P2128, P2132, P2133 | APP sensor circuit continuity test (powertrain malfunction indicator [wrench], non-MIL). |
| P2121, P2126, P2131 | APP range/performance (powertrain malfunction indicator [wrench], non-MIL). |
| P2138, P2140, P2139 | APP to APP sensor correlation (powertrain malfunction indicator [wrench], non-MIL). |
a Correlation and range/performance - sensor disagreement between processors (PCM and E-Quizzer). Monitor execution is continuous. Monitor false detection duration is less than 1 second to register a concern. For additional DTC information, refer toDIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .
| DTCs a | Description (Indicator Lamp) |
|---|---|
| P0122, P0123, P0222, P0223 | TP circuit continuity test (MIL, powertrain malfunction indicator [wrench]). |
| P2135 | TP to TP sensor correlation test (powertrain malfunction indicator [wrench], non-MIL). |
a Correlation and range/performance - sensor disagreement between processors (PCM and E-Quizzer), TP inconsistent with TPPC throttle plate position. Monitor execution is continuous. Monitor false detection duration is less than 1 second to register a concern. For additional DTC information, refer toDIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.