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P2815 2016 GMC Sierra Code - Transmission Control Solenoid Valve 7 Control Circuit High Voltage

Quick Answer

The P2815 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Transmission Control Solenoid Valve 7 Control Circuit High Voltage. Common causes include Damaged wiring or connectors in the transmission control circuit, Faulty transmission control module (TCM), Defective transmission solenoid valve 7. 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
P2815 2016 GMC Sierra indicates Transmission Control Solenoid Valve 7 Control Circuit High Voltage.
Common causes
Common causes include Damaged wiring or connectors in the transmission control circuit, Faulty transmission control module (TCM), Defective transmission solenoid valve 7.
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 14, 2024
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Code P2815 2016 GMC Sierra Description

The P2815 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Transmission Control Solenoid Valve 7 Control Circuit High Voltage. This code indicates that there is a problem with the electrical circuit that controls the transmission solenoid valve 7, resulting in a higher than normal voltage being detected. The transmission control solenoid valves are crucial components in the automatic transmission system, responsible for regulating the flow of transmission fluid to engage specific gears and facilitate smooth gear shifts.

OBDII Code P2815 2016 GMC Sierra - Transmission Control Solenoid Valve 7 Control Circuit High Voltage
P2815 2016 GMC Sierra Code - Transmission Control Solenoid Valve 7 Control Circuit High Voltage

Common Causes of P2815 2016 GMC Sierra

  1. Damaged wiring or connectors in the transmission control circuit
  2. Faulty transmission control module (TCM)
  3. Defective transmission solenoid valve 7
  4. Issues with the power supply to the transmission control system

Symptoms of P2815 2016 GMC Sierra

  1. Erratic shifting patterns
  2. Harsh gear shifts
  3. Transmission slipping
  4. Transmission getting stuck in a particular gear
  5. Illumination of the Check Engine Light

How to Fix P2815 2016 GMC Sierra

  1. Perform a thorough inspection of the transmission control circuit, wiring, and connectors to identify any damage or loose connections.
  2. Test the transmission control module (TCM) for proper functionality and replace if necessary.
  3. Check the transmission solenoid valve 7 for defects and replace if found to be faulty.
  4. Verify the power supply to the transmission control system and address any issues with voltage irregularities.
  5. Clear the DTC and perform a test drive to ensure that the transmission is operating smoothly and the code does not reappear.

Cost to Fix P2815 2016 GMC Sierra

The typical repair costs for addressing the P2815 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the parts required for this repair, such as a new transmission solenoid valve 7 or transmission control module, can range from $150 to $500. Labor costs at auto repair shops typically range from $80 to $150 per hour, and the total repair bill could amount to $300 to $800 or more, including parts and labor.

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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 P2815 2016 GMC Sierra Code

1. What does the OBDII code P2815 mean on a 2016 GMC Sierra?

P2815 indicates a problem in the Transmission Control Solenoid Valve 7 Control Circuit, specifically that the circuit is experiencing high voltage.

2. What are common symptoms of code P2815 on a 2016 GMC Sierra?

Symptoms may include harsh shifting, transmission slipping, erratic gear changes, or the vehicle going into limp mode along with the check engine light being illuminated.

3. What causes the P2815 code to appear on a 2016 GMC Sierra?

Common causes include a faulty transmission control solenoid, damaged wiring or connectors in the solenoid circuit, or a malfunctioning transmission control module (TCM).

4. How do I diagnose the P2815 code on my 2016 GMC Sierra?

Start by checking the wiring and connectors for damage or corrosion, then test the transmission control solenoid for proper function. Use a scan tool to monitor the TCM for errors.

5. Can I continue driving my 2016 GMC Sierra with the P2815 code?

It’s not recommended to drive with this code as it may cause further transmission damage or unsafe driving conditions due to erratic shifting.

6. How do I fix the P2815 code on a 2016 GMC Sierra?

Repairs may include replacing the faulty solenoid, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the TCM if necessary.

7. How much does it cost to repair a P2815 code on a 2016 GMC Sierra?

Costs vary depending on the repair needed. Solenoid replacement can cost $200-$400, while TCM repairs or replacements may range from $500-$1,200, including labor.

8. Can a failing battery cause the P2815 code on a 2016 GMC Sierra?

While unlikely, electrical issues such as a weak or failing battery can sometimes contribute to transmission control circuit problems.

9. How do I prevent the P2815 code from reoccurring on my 2016 GMC Sierra?

Regularly inspect and maintain the transmission system, including checking wiring and connectors for damage and ensuring proper fluid levels and quality.

10. Is the P2815 code covered under warranty for a 2016 GMC Sierra?

It depends on your warranty terms. Powertrain warranties often cover transmission-related issues, so check with your dealership or warranty provider.

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