P0956

2017-10-10

Description:

  • The fault code P0956 indicates a range or performance issue in the auto shift manual mode circuit. This circuit is responsible for controlling the operation of the automatic transmission's auto shift manual mode, which allows the driver to manually shift gears. A range or performance issue in this circuit can result in improper functioning of the auto shift manual mode.

Possible Symptoms:

  • Inability to engage or operate the auto shift manual mode

  • Erratic or inconsistent shifting behavior in the auto shift manual mode

  • Poor performance or reduced power in the vehicle's transmission system

Possible Causes:

  • Faulty or damaged auto shift manual mode switch

  • Wiring issues, such as short circuits or open circuits in the auto shift manual mode circuit

  • Faulty transmission control module (TCM)

  • Incorrect calibration or programming of the TCM

Related Parts:

  • Auto Shift:

Possible Solutions:

  • Inspect the auto shift manual mode switch for any signs of damage or wear. Replace the switch if necessary.

  • Check the wiring and connections in the auto shift manual mode circuit for any short circuits, open circuits, or damaged wires. Repair or replace the wiring as needed.

  • Test the transmission control module (TCM) for proper operation. If the TCM is faulty, it may need to be replaced or reprogrammed.

  • Ensure that the TCM is calibrated and programmed correctly.

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