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P0971 2018 Chevrolet Silverado Code - Pressure Control Solenoid Valve 3 Control Circuit High Voltage

Quick Answer

The P0971 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates a problem with the Pressure Control Solenoid Valve 3 Control Circuit, specifically detecting high voltage. Common causes include Wiring harness issues, Faulty pressure control solenoid valve, Malfunctioning 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
P0971 2018 Chevrolet Silverado indicates Pressure Control Solenoid Valve 3 Control Circuit High Voltage.
Common causes
Common causes include Wiring harness issues, Faulty pressure control solenoid valve, Malfunctioning 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P0971 2018 Chevrolet Silverado Description

The P0971 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates a problem with the Pressure Control Solenoid Valve 3 Control Circuit, specifically detecting high 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 high voltage, it means that there is an electrical issue affecting the solenoid valve's operation.

OBDII Code P0971 2018 Chevrolet Silverado - Pressure Control Solenoid Valve 3 Control Circuit High Voltage
P0971 2018 Chevrolet Silverado Code - Pressure Control Solenoid Valve 3 Control Circuit High Voltage

Common Causes of P0971 2018 Chevrolet Silverado

  1. Wiring harness issues
  2. Faulty pressure control solenoid valve
  3. Malfunctioning transmission control module (TCM)
  4. Short circuit in the control circuit
  5. Electrical interference or corrosion

Symptoms of P0971 2018 Chevrolet Silverado

  1. Erratic shifting
  2. Harsh shifts
  3. Delayed engagement
  4. Limp mode activation
  5. Transmission failure to shift gears properly

How to Fix P0971 2018 Chevrolet Silverado

  1. Begin by conducting a thorough visual inspection of the wiring harness, connectors, and solenoid valve for any signs of damage or corrosion.
  2. Use a multimeter to test the resistance and continuity of the solenoid valve and the control circuit to identify any faulty components.
  3. Check the transmission control module (TCM) for any error codes and perform a diagnostic scan to pinpoint the exact source of the high voltage issue.
  4. Replace any damaged wiring harnesses, connectors, or the pressure control solenoid valve as needed.
  5. Clear the DTC from the vehicle's computer and perform a test drive to ensure that the transmission is functioning properly.

Cost to Fix P0971 2018 Chevrolet Silverado

The typical repair costs for addressing a P0971 code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, replacing a pressure control solenoid valve or repairing wiring harnesses can cost between $200 and $500, including parts and labor. However, if the issue is related to the transmission control module (TCM) or requires more extensive repairs, the cost could range from $500 to $1000 or more. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. For a more accurate estimate, it's recommended to consult with a local mechanic or dealership.

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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 P0971 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0971 in a 2018 Chevrolet Silverado?

The common symptoms of code P0971 can include issues with shifting gears, transmission slipping, harsh shifting, and the transmission going into limp mode.

2. What does the OBDII code P0971 in a 2018 Chevrolet Silverado indicate?

OBDII code P0971 indicates a malfunction in the Pressure Control Solenoid Valve 3 Control Circuit, specifically high voltage being detected.

3. What are the possible causes of OBDII code P0971 in a 2018 Chevrolet Silverado?

Possible causes of code P0971 include a faulty pressure control solenoid valve, damaged wiring or connectors in the control circuit, low transmission fluid levels, or internal transmission issues.

4. How serious is OBDII code P0971 in a 2018 Chevrolet Silverado?

Code P0971 should be taken seriously as it can lead to transmission performance issues and potential damage if not addressed promptly.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P0971?

It is not recommended to continue driving your vehicle with code P0971 as it can cause further damage to the transmission. It's best to have the issue diagnosed and repaired as soon as possible.

6. How can I diagnose OBDII code P0971 in my 2018 Chevrolet Silverado?

Diagnosing code P0971 typically involves checking the pressure control solenoid valve, inspecting the wiring and connectors in the control circuit, and ensuring proper transmission fluid levels.

7. What are some repair tips for fixing OBDII code P0971 in a 2018 Chevrolet Silverado?

Repair tips may include replacing the pressure control solenoid valve, repairing any damaged wiring or connectors, checking and topping up transmission fluid, and clearing the code with a diagnostic tool.

8. Can I reset OBDII code P0971 in my 2018 Chevrolet Silverado by disconnecting the battery?

While disconnecting the battery may temporarily clear the code, it's important to address the underlying issue causing code P0971 to prevent it from reoccurring.

9. How much does it typically cost to repair OBDII code P0971 in a 2018 Chevrolet Silverado?

The cost of repairing code P0971 can vary depending on the exact cause of the issue, but it may involve parts and labor expenses ranging from $200 to $600 or more.

10. Is it necessary to take my 2018 Chevrolet Silverado to a professional mechanic for OBDII code P0971 diagnosis and repair?

While some DIY enthusiasts may attempt to diagnose and repair code P0971, it is recommended to consult a professional mechanic with experience in transmission systems for accurate diagnosis and proper repair.

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