P0971 2018 GMC Sierra Code - Pressure Control Solenoid Valve 3 Control Circuit High Voltage
Quick Answer
The P0971 code for a 2018 GMC Sierra indicates a problem with the Pressure Control Solenoid Valve 3 Control Circuit, specifically detecting high voltage. Common causes include Faulty Pressure Control Solenoid Valve 3, Wiring or electrical connection issues, Corrosion or damage to the 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
- P0971 2018 GMC Sierra indicates Pressure Control Solenoid Valve 3 Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Pressure Control Solenoid Valve 3, Wiring or electrical connection issues, Corrosion or damage to the 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 P0971 2018 GMC Sierra Description
The P0971 code for a 2018 GMC Sierra indicates a problem with the Pressure Control Solenoid Valve 3 Control Circuit, specifically detecting high voltage. This solenoid valve is responsible for regulating the hydraulic pressure within the transmission, which is crucial for proper gear shifting and overall transmission performance. When the control circuit is reporting high voltage, it means that there may be an issue with the electrical signal being sent to the solenoid, potentially leading to erratic shifting, harsh gear changes, or even transmission slippage.
Common Causes of P0971 2018 GMC Sierra
- Faulty Pressure Control Solenoid Valve 3
- Wiring or electrical connection issues
- Corrosion or damage to the solenoid valve
- Transmission fluid contamination
- PCM (Powertrain Control Module) failure
Symptoms of P0971 2018 GMC Sierra
- Harsh or delayed shifting
- Transmission slipping
- Check Engine Light illuminated
- Transmission overheating
- Loss of power or acceleration
How to Fix P0971 2018 GMC Sierra
- Diagnose the issue with a scan tool to confirm the P0971 code and identify the exact cause of the problem.
- Inspect the wiring and electrical connections related to the Pressure Control Solenoid Valve 3 for any damage or corrosion.
- Test the solenoid valve itself to determine if it is functioning properly. Replace if necessary.
- Clear the trouble codes and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, further diagnostics may be needed to pinpoint the exact cause of the high voltage in the control circuit.
Cost to Fix P0971 2018 GMC Sierra
The cost of repairing a P0971 code can vary depending on the exact cause of the issue. Typically, the cost of replacing a Pressure Control Solenoid Valve 3 can range from $150 to $300, including parts and labor. Additional costs may apply if there are other underlying issues that need to be addressed. It's recommended to consult with a professional mechanic for a more accurate estimate based on your specific vehicle and location.
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