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P0973 2016 GMC Sierra Code - Shift Solenoid Valve 1 Control Circuit Low Voltage

Quick Answer

The P0973 diagnostic trouble code (DTC) for a 2016 GMC Sierra specifically relates to the Shift Solenoid Valve 1 Control Circuit Low Voltage. Common causes include Faulty shift solenoid valve, Damaged wiring or connectors in the shift solenoid circuit, Blown fuse related to the transmission system. 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 2016 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 shift solenoid circuit, Blown fuse related to the transmission system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P0973 2016 GMC Sierra Description

The P0973 diagnostic trouble code (DTC) for a 2016 GMC Sierra specifically relates to the Shift Solenoid Valve 1 Control Circuit Low Voltage. This code indicates that there is an issue with the electrical circuit responsible for controlling the first shift solenoid valve in the transmission. The shift solenoid valves are crucial components in automatic transmissions, as they regulate the flow of transmission fluid to engage different gears. In this case, a low voltage condition is being detected in the circuit that controls the first shift solenoid valve.

OBDII Code P0973 2016 GMC Sierra - Shift Solenoid Valve 1 Control Circuit Low Voltage
P0973 2016 GMC Sierra Code - Shift Solenoid Valve 1 Control Circuit Low Voltage

Common Causes of P0973 2016 GMC Sierra

  1. Faulty shift solenoid valve
  2. Damaged wiring or connectors in the shift solenoid circuit
  3. Blown fuse related to the transmission system
  4. Malfunctioning transmission control module (TCM)
  5. Low transmission fluid levels or contaminated fluid

Symptoms of P0973 2016 GMC Sierra

  1. Rough or delayed shifting between gears
  2. Transmission slipping or jerking
  3. Illumination of the Check Engine Light
  4. Reduced fuel efficiency
  5. Inability to shift into certain gears

How to Fix P0973 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the shift solenoid valve 1 and its associated wiring and connectors.
  2. Test the shift solenoid valve for proper functionality using a multimeter to check for continuity and resistance.
  3. Inspect the transmission control module (TCM) for any signs of damage or malfunction.
  4. Replace any faulty shift solenoid valve, damaged wiring, blown fuses, or malfunctioning TCM as needed.
  5. Clear the DTC and test drive the vehicle to ensure that the issue has been resolved and that the transmission is shifting smoothly.

Cost to Fix P0973 2016 GMC Sierra

The typical repair costs for addressing a P0973 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the parts required for this repair, such as a new shift solenoid valve or wiring harness, can range from $100 to $300. Labor costs at an auto repair shop may add an additional $150 to $300, bringing the total repair cost to approximately $250 to $600. It's important to note that these estimates are general guidelines, and actual costs may vary based on factors such as location, labor rates, and the specific components that need to be replaced. It's recommended to consult with a qualified mechanic or repair shop for a more accurate cost estimate tailored to your vehicle's needs.

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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.

Frequently Asked Questions about P0973 2016 GMC Sierra Code

1. What does the OBDII code P0973 mean on a 2016 GMC Sierra?

P0973 indicates a low voltage issue in the control circuit for Shift Solenoid Valve 1, which is part of the transmission system responsible for gear shifting.

2. What are the common symptoms of code P0973 in a 2016 GMC Sierra?

Symptoms may include harsh or delayed shifting, failure to shift gears, transmission being stuck in one gear, or the check engine light illuminating.

3. What causes the P0973 code on a 2016 GMC Sierra?

Possible causes include a faulty shift solenoid, damaged wiring or connectors in the control circuit, low transmission fluid, or a malfunctioning transmission control module (TCM).

4. Can low transmission fluid trigger the P0973 code?

Yes, low or dirty transmission fluid can cause improper solenoid operation, potentially triggering the P0973 code.

5. How do I diagnose the P0973 code on my 2016 GMC Sierra?

Diagnosis involves checking the transmission fluid level, inspecting the wiring and connectors for damage, and testing the shift solenoid and control circuit for proper voltage and resistance.

6. Can I drive my 2016 GMC Sierra with the P0973 code active?

Driving with this code is not recommended, as it can lead to further transmission damage or unsafe driving conditions due to shifting issues.

7. How much does it typically cost to repair the P0973 code on a 2016 GMC Sierra?

Repair costs vary but may range from $150 to $400, depending on whether the issue is with the solenoid, wiring, or other components.

8. Can a faulty transmission control module (TCM) cause the P0973 code?

Yes, a malfunctioning TCM can fail to properly control the shift solenoid, resulting in the P0973 code.

9. What tools are needed to troubleshoot the P0973 code?

Tools may include a scan tool to read codes, a multimeter to test voltage and resistance, and basic hand tools for inspecting and replacing components.

10. How can I prevent the P0973 code from recurring on my 2016 GMC Sierra?

Regularly maintain your transmission by checking fluid levels, replacing fluid as needed, and addressing any wiring or component issues promptly.

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