For Shop Owners

P2127 - Throttle/Pedal Position Sensor/Switch 'E' Circuit Low

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • Faulty Accelerator Pedal Position (APP) Sensor
  • Accelerator Pedal Position (APP) Sensor harness is open or shorted
  • Accelerator Pedal Position (APP) Sensor circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)
What does this mean?

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • No throttle pedal response

P2127 Description

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 accelerator pedal position (APP) sensor 2 is out of self-test range low.
OBDII Code P2127 - Throttle/Pedal Position Sensor/Switch 'E' Circuit Low - itimaster.ru

P2127 Information for specific makes

P2127 ACURA Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 BUICK Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 CADILLAC Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 CHEVROLET Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 DODGE Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 FORD Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 GMC Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 HONDA Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 HYUNDAI Accelerator Position Circuit - Low Input
P2127 INFINITI Accelerator Pedal Position Sensor Circuit
P2127 LEXUS Throttle Pedal Position Sensor/Switch 'E' Circuit Input Low
P2127 LINCOLN Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 MERCURY Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 NISSAN Accelerator Pedal Position Sensor Circuit
P2127 SCION Throttle Pedal Position Sensor/Switch 'E' Circuit Input Low
P2127 TOYOTA Throttle Pedal Position Sensor/Switch 'E' Circuit Input Low

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P2127 Comments

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Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 2
1=Easy 2=Moderate 3=Hard

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