P0638

2017-10-10

Description:

  • The fault code P0638 indicates that there is an issue with the range or performance of the throttle actuator control for bank 1. This may cause the engine to have reduced power or acceleration and may also trigger the check engine light.

Possible Symptoms:

  • Reduced engine power or acceleration

  • Illuminated check engine light

  • Poor throttle response

  • Engine may stall or hesitate during acceleration

Possible Causes:

  • Failed throttle actuator

  • Faulty wiring or connections in the circuit

  • 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 throttle actuator

  • 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

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