P0855

2017-10-10

Description:

  • The fault code P0855 indicates a high voltage condition in the drive switch input circuit. This code typically points to a problem with the electrical circuitry or connection associated with the drive switch, which is responsible for detecting the selection of the Drive gear in automatic transmissions.

Possible Symptoms:

  • Malfunction Indicator Lamp (MIL) or Check Engine Light illuminated

  • Inability to engage the Drive gear

  • Difficulty shifting into the Drive gear

  • Erratic behavior of the transmission

  • Potential limited drivability due to the high voltage condition in the drive switch input circuit

Possible Causes:

  • Faulty drive switch

  • Wiring or connection problems in the drive switch input circuit

  • Loose or corroded connectors in the transmission system

  • Faulty transmission control module (TCM)

  • Intermittent issues with the drive switch input circuit

Related Parts:

  • Drive Switch: Drive switch places the gear in drive ("D") mode in an automatic transmission car

Possible Solutions:

  • Test and replace the faulty drive switch, if necessary

  • Inspect and repair the drive switch input circuit for any issues, such as damaged wires or connectors

  • Ensure the connectors in the transmission system are secure and free from corrosion

  • Test and replace the faulty transmission control module (TCM), if necessary

  • Inspect the drive switch input circuit for any intermittent issues and repair as needed

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