P2122 - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low
- Accelerator Pedal Position (APP) Sensor harness is open or shorted
- Accelerator Pedal Position (APP) Sensor circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
- No throttle pedal response
The Accelerator Pedal Position (APP) sensor is an input to the Powertrain Control Module (PCM) and used to determine the amount of torque requested by the operator. There are 2 pedal position signals in the sensor. Both signals, APP and APP2, have a positive slope (increasing angle, increasing voltage), but are offset and increase at different rates. The 2 pedal position signals make sure the PCM receives a correct input even if 1 signal has a concern. The PCM determines if a signal is incorrect by calculating where it should be, inferred from the other signals. If a concern is present with one of the circuits the other input is used. There are 2 reference voltage circuits, 2 signal return circuits, and 2 signal circuits (a total of 6 circuits and pins) between the PCM and the APP sensor assembly. The pedal position signal is converted to pedal travel degrees (rotary angle) by the PCM. The software converts these degrees to counts, which is the input to the torque based strategy. The P2122 code sets when The accelerator pedal position (APP) sensor 1 is out of self-test range low.
P2122 DODGE Throttle/Pedal Pos Sens F Minimum Stop Perf
P2122 FORD Throttle/Pedal Position Sensor/Switch 'D' Circuit Low
P2122 HONDA Accelerator Pedal Position Sensor 1 Circuit Low Voltage
P2122 HYUNDAI Accelerator Position Circuit - Low Input
P2122 INFINITI Accelerator Pedal Position Sensor Circuit Range/Performance
P2122 LEXUS Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low
P2122 LINCOLN Throttle/Pedal Position Sensor/Switch 'D' Circuit Low
P2122 MERCURY Throttle/Pedal Position Sensor/Switch 'D' Circuit Low
P2122 NISSAN Accelerator Pedal Position Sensor Circuit Range/Performance
P2122 SCION Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low
P2122 TOYOTA Throttle Pedal Position Sensor/Switch 'D' Circuit Input Low
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