AutoCodes – GMC – P0973 2016 GMC Sierra

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

Quick Answer

The shift solenoid 1 is part of the control solenoid valve assembly which has no serviceable parts. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve. 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 Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve.
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.

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Code Popularity 225

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0973 2016 GMC Sierra Description

The shift solenoid 1 is part of the control solenoid valve assembly which has no serviceable parts. The shift solenoid 1 is a normally closed ON/OFF solenoid and is controlled by the Transmission Control Module through a low side driver. When the shift solenoid 1 is energized, shift solenoid 1 fluid pressure is directed to the clutch select valve 2. Power to the shift solenoid 1 is supplied by the Transmission Control Module through a high-side driver. The high-side driver protects the circuit and components from excessive current flow. If excessive current flow is detected, the high side driver will turn OFF. When the fault is corrected, the high-side driver will reset. The Diagnostic Trouble Code (DTC) will be set when the control solenoid valve assembly detects an internal low voltage electrical malfunction of the shift solenoid 1 control circuit when the shift solenoid 1 is commanded OFF for 2 seconds.

OBDII Code P0973 2016 GMC Sierra - Shift Solenoid Valve 1 Control Circuit Low Voltage - AutoCodes.com — P0973 2016 GMC Sierra Code - Shift Solenoid Valve 1 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0973 2016 GMC Sierra?

Low transmission fluid level
Dirty transmission fluid
Faulty Transmission Control Solenoid Valve
Transmission Control Solenoid Valve harness is open or shorted
Transmission Control Solenoid Valve circuit poor electrical connection

How to Fix the DTC P0973 2016 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0973 2016 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0973 2016 GMC Sierra code?

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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.