P0852

2017-10-10

Description:

  • The fault code P0852 indicates that there is an issue with the Park/Neutral Switch Input Circuit in the transmission control module, which detects whether the transmission is in Park or Neutral. This may cause the vehicle to start in gear, or prevent it from starting at all.

Possible Symptoms:

  • Vehicle starts in gear

  • Vehicle does not start at all

  • Illuminated check engine light

  • Inability to shift out of Park or Neutral

Possible Causes:

  • Faulty Park/Neutral switch

  • Short or open circuit in the Park/Neutral switch wiring

  • Failed transmission control module (TCM)

Related Parts:

  • Neutral Switch: The neutral safety switch is a safety feature in automobiles with automatic transmissions. It prevents the car from starting if it is in gear. Problems with this switch will cause difficulty in shifting gears from neutral position

Possible Solutions:

  • Replace the faulty Park/Neutral switch

  • Check and repair any damaged wiring or connections in the Park/Neutral switch circuit

  • Replace the transmission control module (TCM) if necessary

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