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P codepowertrainMedium severity

P2710Shift Solenoid "F" Intermittent

The transmission shift solenoid "F" circuit is cutting in and out intermittently rather than maintaining consistent electrical continuity.

Definition

While driving the solenoid, the TCM/PCM continuously monitors the shift solenoid F circuit; P2710 sets when the circuit's voltage or current momentarily drops out and returns, indicating an intermittent connection rather than a hard failure. Symptoms are typically sporadic: occasional harsh or flared shifts, momentary loss of a gear, or brief trips into failsafe mode that clear on restart, often temperature- or vibration-dependent. The MIL may illuminate intermittently, which can make the fault hard to duplicate in the bay.

Common causes

  • Loose or spread terminal at the transmission case pass-through connector
  • Chafed wiring making intermittent contact with ground
  • Internal transmission harness rubbed through by the valve body or case
  • Solenoid winding that opens when hot
  • Corrosion or fluid intrusion causing an unstable connection

Common misdiagnoses

  • Solenoid replaced when an intermittent harness or terminal was the fault
  • Transmission overhauled for an electrical connection problem
  • TCM replaced without wiggle-testing the circuit
  • Torque converter blamed for intermittent shift complaints

Troubleshooting steps

  1. 1.Review freeze frame for a pattern

    Note whether the fault sets hot, cold, or over rough roads, which tells you whether to heat-soak or vibration-test the circuit.

  2. 2.Wiggle-test the harness

    With a scan tool displaying solenoid status or a meter on the circuit, flex the external harness and connector while watching for dropouts.

  3. 3.Check terminal fit at the connectors

    Inspect the case pass-through and TCM connector terminals for proper drag/tension using a spare terminal pin, and look for fluid wicking into the connector.

  4. 4.Measure resistance hot and cold

    Compare solenoid F circuit resistance at operating temperature versus cold; a reading that goes open when hot indicates a failing winding.

  5. 5.Repair the connection and verify

    Repair or re-pin the faulty connection (or replace the solenoid if it fails hot), then confirm the code stays clear over an extended drive that reproduces the original conditions.

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