P0873

2017-10-10

Description:

  • The fault code P0873 indicates that there is an issue with the transmission fluid pressure sensor/switch circuit 'C' that is reporting a high signal that is beyond the normal operating range. This may cause the transmission to shift erratically or not at all.

Possible Symptoms:

  • Harsh or erratic shifting

  • Transmission may fail to shift

  • Illuminated check engine light

  • Transmission may go into limp mode

Possible Causes:

  • Faulty transmission fluid pressure sensor/switch

  • Damaged or shorted wiring in the circuit

  • Loose or corroded electrical connections in the circuit

  • Failed transmission control module (TCM)

Related Parts:

  • Transmission Fluid Pressure Sensor: Gear fluid line delivers gear fluid/oil between the various gear parts that need lubrication. The Gear fluid line pressure Sensor monitors the fluid pressure in the line. Problems lead to difficulty in shifting gears

Possible Solutions:

  • Replace the transmission fluid pressure sensor/switch

  • Check and repair any damaged or shorted wiring in the circuit

  • Tighten or clean any loose or corroded electrical connections in the circuit

  • Replace the transmission control module (TCM) if necessary

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