P0870

2017-10-10

Description:

  • The fault code P0870 indicates that there is an issue with the circuit for the transmission fluid pressure sensor/switch 'C'. This may cause the transmission to shift poorly or not at all.

Possible Symptoms:

  • Transmission shifting poorly or not at all

  • Illuminated check engine light

  • Delayed or harsh shifting

  • Transmission slipping or overheating

Possible Causes:

  • Failed transmission fluid pressure sensor/switch

  • Faulty wiring or connections in the circuit

  • Loose or corroded electrical connections

  • 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 wiring or connections

  • Tighten or clean any loose or corroded electrical connections

  • Replace the transmission control module (TCM) if necessary

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