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OBD II Fault Code

  • OBD II P2684

OBD-II Code Transmission may not shift properly is defined as a Actuator Supply Voltage "C" Circuit/Open

The transmission uses several actuators to engage an hold gears. If the engine control module (PCM) detects an incorrect signal from the actuator, the PCM will set code P2684.

Transmission may not shift properly Symptoms

  • Transmission may not shift properly

Common Problems That Trigger the P2684 Code

  • Internal transmission failure
  • Powertrain Control Module (PCM) failure
  • Transmission actuator failure
  • Transmission Control Module (TCM) failure
  • Wiring issue
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