• The fault code P0123 indicates that there is an issue with the circuit that controls the throttle position sensor or switch for pedal A. This may cause the engine to run poorly or not start at all.

Possible Symptoms:

  • Reduced engine power or acceleration

  • Illuminated check engine light

  • Difficulty starting the engine

  • Stalling or rough idling

Possible Causes:

  • Faulty throttle position sensor or switch

  • Short circuit in the wiring or connections

  • Loose or corroded electrical connections

  • Failed engine control module (ECM)

Related Parts:

  • Throttle Position Sensor: Throttle position sensor generally denotes the position of the accelerator pedal. Problems lead to poor acceleration

Possible Solutions:

  • Replace the faulty throttle position sensor or switch

  • Check and repair any damaged wiring or connections

  • Tighten or clean any loose or corroded electrical connections

  • Replace the engine control module (ECM) if necessary