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P0966 Pontiac Code - Clutch Pressure Control Solenoid 2 Control Circuit Low Voltage

Quick Answer

The P0966 diagnostic trouble code (DTC) for Pontiac vehicles specifically points to an issue with the Clutch Pressure Control Solenoid 2 Control Circuit registering low voltage. Common causes include Faulty Clutch Pressure Control Solenoid 2, Wiring issues or loose connections in the control circuit, Low transmission fluid levels or contaminated fluid. 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
P0966 Pontiac indicates Clutch Pressure Control Solenoid 2 Control Circuit Low Voltage.
Common causes
Common causes include Faulty Clutch Pressure Control Solenoid 2, Wiring issues or loose connections in the control circuit, Low transmission fluid levels or contaminated fluid.
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 11, 2024
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Code P0966 Pontiac Description

The P0966 diagnostic trouble code (DTC) for Pontiac vehicles specifically points to an issue with the Clutch Pressure Control Solenoid 2 Control Circuit registering low voltage. This code is typically associated with automatic transmission systems and can have significant implications for the vehicle's performance if left unaddressed. The Clutch Pressure Control Solenoid is responsible for regulating hydraulic pressure within the transmission, ensuring smooth gear shifts and overall transmission operation. When the control circuit is experiencing low voltage, it can lead to a variety of transmission-related issues that may affect the vehicle's drivability and overall performance.

OBDII Code P0966 Pontiac - Clutch Pressure Control Solenoid 2 Control Circuit Low Voltage
P0966 Pontiac Code - Clutch Pressure Control Solenoid 2 Control Circuit Low Voltage

Common Causes of P0966 Pontiac

  1. Faulty Clutch Pressure Control Solenoid 2.
  2. Wiring issues or loose connections in the control circuit.
  3. Low transmission fluid levels or contaminated fluid.
  4. Electrical issues, such as a blown fuse or damaged wiring harness.
  5. Internal transmission damage or wear affecting solenoid operation.

Symptoms of P0966 Pontiac

  1. Erratic shifting behavior, such as delayed or harsh gear changes.
  2. Transmission slipping or difficulty engaging gears.
  3. Reduced fuel efficiency due to improper transmission control.
  4. Engine operating at higher RPMs than usual during driving.
  5. Illumination of the check engine light on the dashboard.

How to Fix P0966 Pontiac

  1. Begin by conducting a thorough inspection of the Clutch Pressure Control Solenoid 2 and its wiring connections to identify any visible damage or loose connections.
  2. Check the transmission fluid level and condition, topping off or replacing if necessary to ensure proper hydraulic pressure.
  3. Test the solenoid's electrical resistance and functionality using a multimeter to determine if it is faulty and needs replacement.
  4. Inspect the transmission control module for any signs of damage or malfunction that may be affecting the solenoid's operation.
  5. Clear the fault code from the vehicle's computer after completing the repairs and test drive the vehicle to ensure proper transmission operation.

Cost to Fix P0966 Pontiac

The typical repair costs for addressing a P0966 code in a Pontiac vehicle can vary depending on the specific cause of the issue and the extent of repairs needed. In general, the cost of replacing a faulty Clutch Pressure Control Solenoid 2 can range from $150 to $300, including parts and labor. Additional costs may be incurred if other components, such as wiring harnesses or the transmission control module, require replacement or repair. The total repair bill could amount to $300 to $600, depending on the complexity of the repair process and the rates charged by the auto repair shop.

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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 P0966 Pontiac Code

1. What does the OBDII code P0966 mean on a Pontiac?

P0966 indicates a low voltage issue in the control circuit for Clutch Pressure Control Solenoid 2, which regulates hydraulic pressure in the transmission.

2. What are the common symptoms of a P0966 code in a Pontiac?

Symptoms may include harsh shifting, transmission slipping, poor acceleration, transmission overheating, or the vehicle going into limp mode.

3. What causes the P0966 code to appear?

Common causes include a faulty clutch pressure control solenoid, damaged wiring or connectors, low transmission fluid, or a failure in the transmission control module (TCM).

4. Can I drive my Pontiac with a P0966 code?

Driving with a P0966 code is not recommended as it can damage the transmission further and compromise vehicle performance and safety.

5. How do I diagnose a P0966 code on my Pontiac?

Diagnosis involves checking the transmission fluid level, inspecting the solenoid and its wiring for damage, and using a multimeter to test the control circuit voltage.

6. How is the P0966 code fixed on a Pontiac?

Repairs may include replacing the faulty solenoid, repairing or replacing damaged wiring or connectors, adding or changing transmission fluid, or reprogramming the TCM if needed.

7. What transmission fluid issues can cause a P0966 code?

Low, dirty, or incorrect transmission fluid can lead to insufficient hydraulic pressure, causing solenoid control issues and triggering the code.

8. How much does it cost to fix a P0966 code on a Pontiac?

Repair costs can vary but may range from $150 to $400 for solenoid replacement, plus additional costs if wiring repairs or TCM programming are required.

9. Can a faulty TCM cause the P0966 code in a Pontiac?

Yes, a malfunctioning transmission control module can fail to properly regulate the solenoid, resulting in a low voltage condition and triggering the code.

10. Will clearing the P0966 code fix the problem?

Clearing the code without addressing the underlying issue will only provide a temporary solution, and the code is likely to return. Proper diagnosis and repair are necessary.

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