AutoCodes – GMC – P0964 2018 GMC Sierra

P0964 2018 GMC Sierra Code - Pressure Control Solenoid Valve 2 Control Circuit Open

Quick Answer

The pressure control solenoid 2 is part of the control solenoid valve assembly which has no serviceable parts. Common causes include Low transmission fluid, Faulty Control Solenoid Valve Assembly, Control Solenoid Valve Assembly harness is open or shorted. 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: P0964 2018 GMC Sierra indicates Pressure Control Solenoid Valve 2 Control Circuit Open.
Common causes: Common causes include Low transmission fluid, Faulty Control Solenoid Valve Assembly, Control Solenoid Valve Assembly harness is open or shorted.
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 186

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 P0964 2018 GMC Sierra Description

The pressure control solenoid 2 is part of the control solenoid valve assembly which has no serviceable parts. The normally high-pressure control solenoid 2 regulates and directs the pressure control solenoid 2 oil pressure to the 3-5 reverse clutch regulator valve and 3-5 reverse clutch boost valve. Increasing pressure control solenoid 2 pressure increases pressure to the 3-5 reverse clutch. The Transmission Control Module (TCM) varies the current to the pressure control solenoid 2 through a low side driver. Decreasing the current to the pressure control solenoid 2 increases pressure control solenoid 2 oil pressure by closing OFF the solenoid exhaust port. Increasing the current to the pressure control solenoid 2 decreases pressure control solenoid 2 oil pressure by opening the solenoid exhaust port. Pressure control solenoid 2 power 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 Transmission Control Module detects an open on the pressure control solenoid valve 2 control circuit for 1 s.

OBDII Code P0964 2018 GMC Sierra - Pressure Control Solenoid Valve 2 Control Circuit Open - AutoCodes.com — P0964 2018 GMC Sierra Code - Pressure Control Solenoid Valve 2 Control Circuit Open

What does this mean?

What are the Possible Causes of the DTC P0964 2018 GMC Sierra?

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

How to Fix the DTC P0964 2018 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 P0964 2018 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 P0964 2018 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 P0964 2018 GMC Sierra Code

1. What does the OBDII code P0964 mean on a 2018 GMC Sierra?

P0964 indicates an open circuit issue in the control circuit of Pressure Control Solenoid Valve 2, which regulates transmission fluid pressure.

2. What are the common symptoms of a P0964 code on a 2018 GMC Sierra?

Symptoms may include harsh or erratic shifting, transmission overheating, poor acceleration, or the transmission being stuck in one gear.

3. What causes the P0964 code to appear on my GMC Sierra?

Causes can include a damaged or faulty pressure control solenoid, an open or shorted wiring harness, corroded electrical connections, or issues with the transmission control module (TCM).

4. Can I drive my 2018 GMC Sierra with a P0964 code?

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

5. How do I diagnose the P0964 code on a 2018 GMC Sierra?

Diagnosis involves checking the wiring and connectors for damage or corrosion, testing the solenoid for proper resistance, and verifying the functionality of the TCM.

6. How do I fix a P0964 code on my GMC Sierra?

Repairs may include replacing the faulty solenoid, repairing or replacing damaged wiring, cleaning corroded connections, or updating/replacing the TCM if necessary.

7. How much does it cost to fix a P0964 code on a 2018 GMC Sierra?

Repair costs vary but may range from $200 to $500 for solenoid replacement, while more extensive wiring or TCM repairs can cost significantly more.

8. Can a dirty transmission fluid cause a P0964 code?

While not a direct cause, dirty or low transmission fluid can contribute to solenoid malfunction and should be addressed during diagnosis.

9. Will clearing the P0964 code fix the problem permanently?

Clearing the code without addressing the underlying issue will only temporarily hide the problem, and the code will likely return.

10. Can a bad battery cause the P0964 code on a GMC Sierra?

A weak or failing battery can cause electrical issues, but itâ€™s not a common cause for this specific code. Itâ€™s still worth checking the vehicle's electrical system.