What P2138 means
Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation
Common causes (general)
Before spending money on parts, verify the code with a scan tool and read freeze frame data. Freeze frame captures every sensor value at the moment the code set — this is often enough to figure out the root cause without further testing.
Manufacturer-specific descriptions
Different manufacturers use this code for slightly different failure modes. Here's what your specific make means by P2138:
| AUDI | Accelerator Pedal Position (APP) assembly failure, Powertrain Control Module (PCM) failure, Throttle Position Sensor (TPS) failure, Wiring issue |
| BMW | Throttle/Pedal Position Sensor/Switch "D" / "E" Voltage Correlation |
| GM | Accelerator Pedal Position (APP) Sensors 1-2 Not Plausible |
| HONDA | Accelerator Pedal Position (APP) Sensor 1/2 (Throttle Position Sensor D/E) Incorrect Voltage Correlation |
| MITSUBISHI | APS(main/sub) correlation |
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