P0878

2017-10-10

Description:

  • The fault code P0878 indicates that there is an issue with the transmission fluid pressure sensor/switch D circuit, causing it to register a high voltage reading.

Possible Symptoms:

  • Harsh shifting or slipping transmission

  • Transmission may go into limp mode or fail to shift at all

  • Illuminated check engine light

Possible Causes:

  • Faulty transmission fluid pressure sensor/switch

  • Wiring or electrical connection issues in the sensor/switch circuit

  • Malfunctioning transmission control module (TCM)

  • Low or dirty transmission fluid

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 faulty transmission fluid pressure sensor/switch

  • Check and repair any damaged wiring or electrical connections in the circuit

  • Replace the transmission control module (TCM) if necessary

  • Perform a transmission fluid flush and replace with clean fluid

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