P2808 2018 GMC Sierra Code - Transmission Control Solenoid Valve 7 Stuck Off
Quick Answer
The Transmission Control Module (TCM) uses the vehicle speed signal to determine the actual gear position (1st, 2nd, 3rd, 4th. Common causes include Faulty Transfer Case Shift Control Switch, Transfer Case Shift Control Switch harness is open or shorted, Transfer Case Shift Control Switch circuit poor electrical connection. 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 2018 GMC Sierra indicates Transmission Control Solenoid Valve 7 Stuck Off.
- Common causes
- Common causes include Faulty Transfer Case Shift Control Switch, Transfer Case Shift Control Switch harness is open or shorted, Transfer Case Shift Control Switch circuit poor electrical connection.
- 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.
Code P2808 2018 GMC Sierra Description
What are the Possible Causes of the DTC P2808 2018 GMC Sierra?
- Faulty Transfer Case Shift Control Switch
- Transfer Case Shift Control Switch harness is open or shorted
- Transfer Case Shift Control Switch circuit poor electrical connection
How to Fix the DTC P2808 2018 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2808 2018 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P2808 2018 GMC Sierra code?
Need more information on how to fix the P2808 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2808 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2808 2018 GMC Sierra Code
1. What does the OBDII code P2808 indicate on a 2018 GMC Sierra?
The P2808 code on a 2018 GMC Sierra indicates that the Transmission Control Module (TCM) has detected a problem with solenoid valve 7, specifically that it is stuck in the 'off' position.
2. What are common symptoms of the P2808 code in a 2018 GMC Sierra?
Symptoms of code P2808 can include erratic shifting, the transmission failing to shift into certain gears, the transmission slipping, a decrease in fuel efficiency, and in some cases, the vehicle may enter 'limp' mode to prevent further damage.
3. What can cause the P2808 code to appear in a 2018 GMC Sierra?
Causes of the P2808 code may include a faulty transmission solenoid, wiring issues such as shorts or disconnections, problems with the transmission control module, or low transmission fluid levels.
4. How do you diagnose the P2808 code on a 2018 GMC Sierra?
Diagnosing the P2808 code involves using a scan tool to check for additional codes that could indicate related problems, inspecting the wiring and connectors for damage, testing the transmission solenoid itself for proper operation, and checking the transmission fluid level and condition.
5. What steps should be taken to repair the issue causing the P2808 code in a 2018 GMC Sierra?
To repair the P2808 code, start by checking and, if necessary, replacing the transmission fluid. Inspect all wiring and connectors related to the transmission control solenoid valve 7 for damage or corrosion and repair as needed. If the solenoid is faulty, replace it. If the transmission control module is the cause, it may need to be replaced or reprogrammed.
6. Can driving a 2018 GMC Sierra with the P2808 code cause further damage to the vehicle?
Yes, driving with the P2808 code can lead to further damage to the transmission. It is advisable to address the issue as soon as possible to avoid more extensive repairs.
7. Is it safe to drive a 2018 GMC Sierra with the code P2808 activated?
While the vehicle may still be drivable, it is not recommended to continue driving a 2018 GMC Sierra with the P2808 code without addressing the issue, as it can compromise the safety and functionality of the transmission system.
8. What tools are required to diagnose the P2808 code on a 2018 GMC Sierra?
Diagnosing the P2808 code typically requires a diagnostic scan tool to read and clear codes, a multimeter for testing wiring continuity and solenoid functionality, and basic hand tools for accessing the transmission components.
9. How often does the transmission control solenoid valve 7 need to be replaced in a 2018 GMC Sierra?
The transmission control solenoid valve 7 does not have a regular replacement interval and should only need to be replaced if it fails or malfunctions, as indicated by diagnostic trouble codes like P2808.
10. What is the estimated repair cost for fixing the P2808 code in a 2018 GMC Sierra?
The cost to repair the P2808 code can vary widely depending on the nature of the problem. Replacing a transmission solenoid can cost anywhere from $150 to $400 including parts and labor, while more extensive repairs involving wiring or the transmission control module can be significantly more expensive.
Discuss the causes and fixes for P2808 2018 GMC Sierra OBDII Code
Code P2808 2018 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
