P0223 - THROTTLE POSITION SENSOR/SWITCH B CIRCUIT HIGH INPUT

POST UPDATED IN November, 2021

Description of DTC code P0223 Generic

The DTC code P0223 OBDII is established when the Powertrain Control Module (PCM) detects a signal voltage from the Throttle Position Sensor (TPS), which does not match the current engine speed.

The TPS sensor changes its resistance according to the movements of the accelerator pedal. Also, the sensor relies on signals from the PCM to operate the throttle valve, and at the same time, it provides detailed information about the width of the throttle valve.

To complete the circuit, there is another sensor connected to the accelerator. This generates current when a moving part moves through a magnetic field. This signal is used by the PCM which triggers a mechanism in the TPS sensor to change the position of the throttle plate. The changes in throttle opening are used by the PCM to adjust the ignition timing, variable valve timing, and injector pulse duration to ensure maximum engine performance of any load.

Symptoms of fault code P0223 Generic

  • Check Engine Lighting
  • The engine may not start.
  • Poor acceleration.
  • Power loss.
  • Instability at idle.
  • Black smoke from the exhaust.

Causes of OBD2 P0223 Generic

The reasons for setting the diagnostic code P0223 OBD2 are

  • There may be short circuits between the Throttle Position Sensor and the Powertrain Control Module.
  • The electrical connectors may be corroded.
  • The TPS sensor is defective.

Possible solutions of the DTC code P0223 Generic

To correct the problems caused by the error code P0223 OBDII, you should do the following:

  • Inquire about the Technical Service Bulletins.
  • Inspect all cables and respective connectors related to the system. Besides, check the throttle plate, maybe it has excess carbon. Clean the carbon from the throttle body according to the manufacturer's recommendations. Repair or replace defective wiring.
  • Use a Digital Volt-Ohm Meter (DVOM) and watch the voltages of the TPS sensor. Generally, it should be between 0.5 volts with the throttle closed and 4.5 volts with the throttle open. If there are irregularities, the sensor is defective, replace it.

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