Engine-CodesGMC – P0973 2015 GMC Sierra

P0973 2015 GMC Sierra Code - Shift Solenoid Valve 1 Control Circuit Low Voltage

Quick Answer

The P0973 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Shift Solenoid Valve 1 Control Circuit having low voltage. Common causes include Faulty shift solenoid valve, Damaged wiring or connectors in the control circuit, Malfunctioning transmission control module (TCM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0973 2015 GMC Sierra indicates Shift Solenoid Valve 1 Control Circuit Low Voltage.
Common causes
Common causes include Faulty shift solenoid valve, Damaged wiring or connectors in the control circuit, Malfunctioning transmission control module (TCM).
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0973 2015 GMC Sierra Description

The P0973 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Shift Solenoid Valve 1 Control Circuit having low voltage. In automatic transmissions, shift solenoids play a crucial role in controlling the flow of transmission fluid to engage different gears. Solenoids are electromechanical devices that open and close to allow fluid to flow through the transmission system, enabling smooth gear shifts.

OBDII Code P0973 2015 GMC Sierra - Shift Solenoid Valve 1 Control Circuit Low Voltage
P0973 2015 GMC Sierra Code - Shift Solenoid Valve 1 Control Circuit Low Voltage

Common Causes of P0973 2015 GMC Sierra

  1. Faulty shift solenoid valve
  2. Damaged wiring or connectors in the control circuit
  3. Malfunctioning transmission control module (TCM)
  4. Low transmission fluid levels
  5. Electrical issues such as blown fuses or relays

Symptoms of P0973 2015 GMC Sierra

  1. Harsh or delayed shifting
  2. Slipping gears
  3. Stuck in a particular gear
  4. Limp mode activation
  5. Illuminated Check Engine Light

How to Fix P0973 2015 GMC Sierra

  1. Perform a thorough diagnostic scan to confirm the P0973 code and identify the specific cause of the issue.
  2. Inspect the shift solenoid valve 1 and its wiring for any signs of damage or corrosion.
  3. Test the transmission control module (TCM) to ensure it is sending the correct signals to the solenoid.
  4. Replace the faulty shift solenoid valve if necessary and repair any damaged wiring or connectors.
  5. Clear the DTC and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0973 2015 GMC Sierra

The typical repair costs for addressing a P0973 code on a 2015 GMC Sierra can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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