Engine-CodesGMC – P2808 2017 GMC Sierra

P2808 2017 GMC Sierra Code - Transmission Control Solenoid Valve 7 Stuck Off

Quick Answer

The P2808 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with Transmission Control Solenoid Valve 7 being stuck off. Common causes include Faulty transmission control solenoid valve, Wiring issues or electrical problems, Malfunctioning transmission control module. 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
P2808 2017 GMC Sierra indicates Transmission Control Solenoid Valve 7 Stuck Off.
Common causes
Common causes include Faulty transmission control solenoid valve, Wiring issues or electrical problems, Malfunctioning transmission control module.
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.
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P2808 2017 GMC Sierra Description

The P2808 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with Transmission Control Solenoid Valve 7 being stuck off. The transmission control solenoid valves are crucial components in the vehicle's automatic transmission system. These valves regulate the flow of transmission fluid to control gear shifting, torque converter lock-up, and other transmission functions. Solenoid Valve 7 being stuck off means that the valve is not functioning properly, which can lead to various issues with the transmission's performance.

OBDII Code P2808 2017 GMC Sierra - Transmission Control Solenoid Valve 7 Stuck Off
P2808 2017 GMC Sierra Code - Transmission Control Solenoid Valve 7 Stuck Off

Common Causes of P2808 2017 GMC Sierra

  1. Faulty transmission control solenoid valve
  2. Wiring issues or electrical problems
  3. Malfunctioning transmission control module
  4. Clogged transmission filter
  5. Low transmission fluid levels

Symptoms of P2808 2017 GMC Sierra

  1. Harsh or delayed shifting
  2. Erratic gear changes
  3. Transmission slipping
  4. Poor acceleration
  5. Decreased fuel efficiency

How to Fix P2808 2017 GMC Sierra

  1. Begin by performing a thorough inspection of the transmission system to identify the root cause of the issue.
  2. Test the Transmission Control Solenoid Valve 7 to determine if it is functioning correctly or needs to be replaced.
  3. Check the wiring and electrical connections related to the solenoid valve for any damage or loose connections.
  4. Inspect the transmission control module for any signs of malfunction and address any issues found.
  5. If necessary, replace the faulty solenoid valve, repair any damaged wiring, and refill the transmission fluid to the proper level.

Cost to Fix P2808 2017 GMC Sierra

The typical repair costs for addressing a Transmission Control Solenoid Valve 7 stuck off issue in a 2017 GMC Sierra can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher at dealerships or in metropolitan areas. Independent shops often offer lower labor rates. For a more accurate estimate, it's recommended to check local rates before proceeding with the repair.

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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 P2808 2017 GMC Sierra Code

1. What does the OBDII code P2808 mean on a 2017 GMC Sierra?

P2808 indicates that the Transmission Control Solenoid Valve 7 is stuck in the "off" position, which can affect gear shifting and overall transmission performance.

2. What are the common symptoms of the P2808 code on a 2017 GMC Sierra?

Symptoms may include difficulty shifting gears, slipping gears, harsh shifting, transmission overheating, or the Check Engine Light being illuminated.

3. What causes the P2808 code to appear on a 2017 GMC Sierra?

Common causes include a faulty transmission solenoid valve, clogged hydraulic passages, low transmission fluid, or electrical issues like damaged wiring or connectors.

4. Can low transmission fluid cause the P2808 code?

Yes, low or contaminated transmission fluid can lead to improper solenoid function and trigger the P2808 code.

5. Is it safe to drive a 2017 GMC Sierra with the P2808 code?

Driving with this code is not recommended, as it can cause further transmission damage or lead to unsafe driving conditions due to gear shifting issues.

6. How is the P2808 code diagnosed?

A mechanic will use a scan tool to confirm the code, inspect the transmission fluid condition, check the solenoid valve for proper operation, and test related wiring and connectors.

7. How do you fix the P2808 code on a 2017 GMC Sierra?

Repairs may include replacing the faulty solenoid valve, cleaning or flushing the transmission, repairing damaged wiring, or refilling/servicing the transmission fluid.

8. How much does it cost to repair the P2808 code on a GMC Sierra?

Repair costs vary but typically range from $200 to $400 for solenoid replacement. Additional costs may apply for fluid changes or electrical repairs.

9. Can a P2808 code be caused by an electrical issue?

Yes, damaged wiring, corroded connectors, or poor connections in the solenoid circuit can trigger the P2808 code.

10. Will resetting the Check Engine Light fix the P2808 code?

No, resetting the light will not fix the underlying issue. The cause of the P2808 code must be identified and repaired to prevent it from returning.

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