POST UPDATED IN January, 2023

Description of DTC code P2127 Generic

When the P2127 OBDII diagnostic code is set, it indicates that the Powertrain Control Module (PCM) has detected that the Throttle Position Sensor (TPS) has an excessively low voltage. Depending on the vehicle model, the limit of this voltage can be between 0.17 to 0.20 volts.

It should be noted that the “E” description of this code may refer to a particular circuit or sensor. If the PCM sets this code, it is because the signal is below 0.17 V and caused by a short to ground or lack of reference voltage.

Symptoms of fault code P2127 Generic

  • The Check Engine light turns on.
  • Rough motor operation.
  • The vehicle may not accelerate when the pedal is depressed.

Causes of OBD2 P2127 Generic

Reason to set the P2127 OBD2 error code:

  • Wrong installation of the Accelerator Position Sensor.
  • The TPS sensor circuit may be shorted to the ground due to damage to its wiring.
  • Perhaps the Throttle Position Sensor is defective.

Possible solutions of the DTC code P2127 Generic

To correctly resolve the faults associated with the DTC P2127 OBDII code, you must take into account the following suggestions:

  • Check the Throttle Position Sensor along with its wires and respective connector with caution. Fix or replace any defective component.
  • Consult the service manual for the voltage corresponding to the TPS Sensor for your vehicle. If the actual voltage does not match the specified voltage, you should repair or replace it if necessary.
  • Check that the TPS sensor is correctly aligned. Refer to the manufacturer's specifications for the steps to follow.



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