P0966 2018 GMC Sierra Code - Pressure Control Solenoid Valve 2 Control Circuit Low Voltage
Quick Answer
The P0966 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Pressure Control Solenoid Valve 2 Control Circuit experiencing low voltage. Common causes include Faulty Pressure Control Solenoid Valve 2, Damaged wiring or connectors in the control circuit, Defective Transmission Control Module (TCM). 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 2018 GMC Sierra indicates Pressure Control Solenoid Valve 2 Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty Pressure Control Solenoid Valve 2, Damaged wiring or connectors in the control circuit, Defective Transmission Control Module (TCM).
- 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 P0966 2018 GMC Sierra Description
The P0966 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Pressure Control Solenoid Valve 2 Control Circuit experiencing low voltage. This solenoid valve is a crucial component of the transmission system, responsible for regulating hydraulic pressure to control gear shifting. When the control circuit detects low voltage, it can lead to improper transmission operation, affecting the vehicle's performance and drivability.
Common Causes of P0966 2018 GMC Sierra
- Faulty Pressure Control Solenoid Valve 2
- Damaged wiring or connectors in the control circuit
- Defective Transmission Control Module (TCM)
- Weak or failing battery
- Corrosion or poor connections in the circuit
Symptoms of P0966 2018 GMC Sierra
- Harsh shifting between gears
- Delayed gear engagement
- Transmission slipping
- Decreased fuel efficiency
- Transmission overheating
How to Fix P0966 2018 GMC Sierra
- Begin by conducting a thorough inspection of the wiring, connectors, and solenoid valve for any visible damage or corrosion.
- Test the solenoid valve and control circuit using a multimeter to check for proper voltage and continuity.
- If the solenoid valve is faulty, replace it with a new, OEM-quality component.
- Repair or replace any damaged wiring or connectors in the control circuit.
- Clear the DTC with a diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0966 2018 GMC Sierra
The cost of repairing a P0966 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the cost of replacing a Pressure Control Solenoid Valve 2 can range from $150 to $300, while labor costs can add another $100 to $200. Overall, you can expect to pay between $250 and $500 for parts and labor. Keep in mind that prices may vary based on location, vehicle make and model, and the repair shop you choose. It's recommended to obtain quotes from multiple reputable auto repair shops to ensure a competitive price.
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