P0121

2017-10-10

Description:

  • The fault code P0121 indicates that there is an issue with the circuit of the throttle or pedal position sensor/switch 'A'. This may cause the engine to lack power or even stall.

Possible Symptoms:

  • Reduced engine power or acceleration

  • Unresponsive throttle or accelerator pedal

  • Stalling or intermittent loss of power

  • Illuminated check engine light

Possible Causes:

  • Faulty or damaged throttle or pedal position sensor/switch

  • Wiring issues or loose connections in the circuit

  • Corroded or dirty 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 or pedal position sensor/switch

  • Inspect and repair any damaged wiring or connections

  • Clean or tighten any corroded or dirty electrical connections

  • Replace the engine control module (ECM) if necessary

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