P0804

2017-10-10

Description:

  • The fault code P0804 indicates that there is an issue with the circuit that controls the upshift (skip shift) lamp. This circuit is responsible for indicating the driver to change gears when accelerating. This fault code may cause the upshift lamp to perform improperly or not at all.

Possible Symptoms:

  • Upshift (skip shift) lamp not illuminating

  • Illuminated check engine light

  • Delayed or improper shifting

  • Reduced fuel efficiency

Possible Causes:

  • Failed upshift lamp control module

  • Faulty wiring or connections in the circuit

  • Loose or corroded electrical connections

  • Failed transmission control module (TCM)

Related Parts:

  • Transmission Shift Sensor: Gear Shift Sensor communicates the position the gear shifted to. Problems lead to difficulty in shifting gears

Possible Solutions:

  • Replace the upshift lamp control module

  • Check and repair any damaged wiring or connections

  • Tighten or clean any loose or corroded electrical connections

  • Replace the transmission control module (TCM) if necessary

Search