P2793: Low Gear Shift Direction Circuit OBD-II Trouble Code


When you engage a gear in your vehicle, the ECU observes your selection and cross-references it with data received from various speed sensors and engine sensors. If the computer detects a mismatch between your chosen gear range and the vehicle’s current conditions, it will trigger a P2793 Diagnostic Trouble Code (DTC).

How Severe Is A P2793 Code

A P2793 diagnostic trouble code is of notable significance because the ECU relies on the gear shift direction circuit to determine the appropriate shift strategy and engine configuration. This DTC is often associated with common transmission issues, such as harsh gear changes, diminished engine and vehicle performance, and gear engagement failures.

Common Symptoms of P2793

Typical symptoms associated with a P2793 code include:

    • Unusually harsh gear transitions.
    • Slippage between gears.
    • Delayed shifting.
    • Inability to engage specific gears.
    • Reduced overall vehicle performance.
    • Activation of limp mode.

Potential Causes of P2793 Codes

Several factors can lead to a P2793 DTC, including:

    • Damaged wiring or connectors within the circuit.
    • Malfunctioning shifter assembly or its components.
    • Malfunction or misadjustment of the transmission range sensor.
    • The possibility of a shorted wire, a damaged connector, or a failed component inside the shifter assembly.

How To Diagnose A P2793 Code

When diagnosing a P2793 OBD-II trouble code, consider the following steps:

    • Inspect the condition of the wiring and connectors, looking for signs of damage or wear within the circuit.
    • Evaluate the functionality of the shifter assembly, checking for any defects or issues.
    • Examine the transmission range sensor for potential malfunction or misalignment.
    • Consult manufacturer Technical Service Bulletins (TSBs) for additional insights into the problem.

What Is The Best Way To Repair A P2793 Code?

To properly address the P2793 DTC, consider the following repairs:

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

What Does It Cost To Diagnose or Repair A P2793 Code?

The cost associated with diagnosing a P2793 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.