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Engine-Codes – GMC – P0964 GMC

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

Quick Answer

The P0964 diagnostic trouble code (DTC) for GMC vehicles indicates a problem with the Pressure Control Solenoid Valve 2 Control Circuit being open. Common causes include Faulty Pressure Control Solenoid Valve 2, Wiring or connector issues in the control circuit, Transmission control module (TCM) failure. 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 GMC indicates Pressure Control Solenoid Valve 2 Control Circuit Open.
Common causes
Common causes include Faulty Pressure Control Solenoid Valve 2, Wiring or connector issues in the control circuit, Transmission control module (TCM) failure.
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 Aug 19, 2024
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Code P0964 GMC Description

The P0964 diagnostic trouble code (DTC) for GMC vehicles indicates a problem with the Pressure Control Solenoid Valve 2 Control Circuit being open. This valve is responsible for regulating the hydraulic pressure within the transmission, which is crucial for proper shifting and overall transmission performance. When this circuit is open, it means that there is a break or interruption in the electrical connection between the solenoid valve and the transmission control module (TCM).

OBDII Code P0964 GMC - Pressure Control Solenoid Valve 2 Control Circuit Open
P0964 GMC Code - Pressure Control Solenoid Valve 2 Control Circuit Open

Common Causes of P0964 GMC

  1. Faulty Pressure Control Solenoid Valve 2
  2. Wiring or connector issues in the control circuit
  3. Transmission control module (TCM) failure
  4. Low transmission fluid levels or contaminated fluid
  5. Electrical problems within the transmission system

Symptoms of P0964 GMC

  1. Erratic shifting or difficulty shifting gears
  2. Harsh or abrupt gear changes
  3. Transmission slipping
  4. Transmission going into limp mode
  5. Check engine light illuminated

How to Fix P0964 GMC

  1. Begin by conducting a thorough inspection of the wiring and connectors associated with the Pressure Control Solenoid Valve 2 to check for any damage or loose connections.
  2. Test the solenoid valve itself to determine if it is functioning correctly. If faulty, replace the Pressure Control Solenoid Valve 2.
  3. Inspect the transmission control module (TCM) for any signs of damage or malfunction. Replace or reprogram the TCM if necessary.
  4. Check the transmission fluid level and condition. Top off or replace the fluid as needed.
  5. Clear the DTC and reset the TCM to ensure proper communication between the components.

Cost to Fix P0964 GMC

The cost of repairing a P0964 code can vary depending on the specific cause of the issue. However, on average, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that prices may fluctuate based on your location, the make and model of your vehicle, and the rates of the auto repair shop you choose. It's recommended to get a personalized quote from a trusted mechanic to get a more accurate estimate.

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Information for Specific GMC Models

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 GMC Code

1. What does the OBD-II code P0964 mean on a GMC vehicle?

The P0964 code indicates an open circuit condition in the Pressure Control Solenoid Valve 2, which manages hydraulic pressure in the transmission.

2. What are the common symptoms of the P0964 code?

Symptoms may include harsh or erratic shifting, transmission slipping, reduced fuel efficiency, and illumination of the check engine light.

3. What causes the P0964 code to appear on a GMC vehicle?

Common causes include faulty pressure control solenoid valve, damaged wiring or connectors, transmission fluid contamination, or issues with the transmission control module (TCM).

4. Can a P0964 code cause further damage if ignored?

Yes, ignoring this code can lead to severe transmission damage, reduced drivability, and costly repairs over time.

5. How do you diagnose a P0964 code on a GMC vehicle?

Diagnosis typically involves checking the solenoid valve and its wiring for damage, inspecting transmission fluid condition, and testing the TCM for proper operation.

6. Is it safe to drive a GMC vehicle with a P0964 code?

Driving with a P0964 code is not recommended, as it can impact shifting performance and lead to transmission damage.

7. How can the P0964 code be fixed on a GMC vehicle?

Repairs may include replacing the pressure control solenoid valve, repairing or replacing damaged wiring or connectors, flushing and replacing transmission fluid, or updating/replacing the TCM.

8. What tools are needed to diagnose and fix the P0964 code?

You’ll need an OBD-II scanner, multimeter, basic hand tools, and potentially a transmission fluid flush kit.

9. How much does it cost to repair the P0964 code on a GMC vehicle?

Repair costs vary but typically range from $150 to $600, depending on whether the solenoid or wiring needs replacement or if the issue is with the TCM.

10. Can low transmission fluid cause the P0964 code?

Yes, low or contaminated transmission fluid can contribute to pressure control solenoid issues and trigger the P0964 code.

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