OBD Codes List

Diagnostic reference · P2791

P2791

Gate Select Direction Circuit Low

System
Transmission (P code)
Lamp
Check Engine Light
Category
Powertrain - Transmission

What it means

P2791 means Gate Select Direction Circuit Low.

Check these first

  • A short to ground in the gate select direction circuit
  • An open in the gate select direction circuit
  • A failed gate select actuator
  • A corroded gate select direction connector

What to do next

  1. Read gate select direction status on a scan tool
  2. Command the gate select actuator both directions
  3. Test the gate select direction circuit for a short to ground
  4. Measure gate select actuator resistance
  5. Replace the gate select actuator if the circuit tests good
  6. Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.