P2794: Low Gear Shift Direction Circuit OBD-II Trouble Code


When you select a gear using your shifter, it sends a signal to the ECU, which interprets this signal to optimize the engine and transmission settings for your chosen gear. However, if the computer detects that your gear selection does not align with the vehicle’s behavior, as indicated by data from speed sensors and other components, it triggers a P2794 Diagnostic Trouble Code (DTC).

Severity of the Code A P2794 diagnostic trouble code indicates that the computer is using inaccurate data to make critical decisions regarding shift strategy and fuel delivery. This can significantly affect drivability, leading to transmission issues such as harsh shifts, erratic transmission behavior, and gear engagement failures.

Common Symptoms of P2794 Code

  • Harsh gear shifts
  • Slippage between gears
  • Erratic shifting patterns
  • Delayed gear transitions
  • Failure to engage specific gears
  • Decreased overall vehicle performance
  • Getting stuck in a particular gear
  • Activation of limp mode

What Causes A P2794 Codes?

Several factors can trigger a P2794 DTC, including:

  • Damaged wiring and/or connectors in the circuit
  • Malfunctioning shifter assembly or its components
  • Malfunction or misalignment of the transmission range sensor
  • Simple issues such as a shorted wire or corroded connector

How To Diagnosing A P2794 OBD-II trouble code

  • Inspect the condition of the wiring and connectors for any signs of damage or corrosion within the circuit
  • Evaluate the functionality of the shifter assembly, checking for any faults
  • Examine the transmission range sensor for potential malfunction or misalignment

Best Way To Repair A P2794 Code

Repairs To address the P2794 DTC, consider the following repairs:

  • Repair or replace any damaged wiring or connectors within the circuit
  • Replace the shifter assembly if it is found to be defective
  • Adjust or replace the transmission range sensor to ensure proper functionality

How Much Does It Cost To Diagnose or Repair a P2794 Code?

The cost associated with diagnosing a P2794 trouble code can vary:

  • If you have access to a code reader, you can retrieve the code independently
  • Many local auto parts stores may offer code reading services at no charge
  • If you choose to visit a transmission repair shop, there may be a fee for code reading and subsequent diagnostic procedures. Costs can range from minimal to several hundred dollars, depending on the complexity of the diagnosis