AutoCodes – GMC – P2808 2014 GMC Sierra

P2808 2014 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 2014 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.

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Code Popularity 342

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2808 2014 GMC Sierra Description

The Transmission Control Module (TCM) uses the vehicle speed signal to determine the actual gear position (1st, 2nd, 3rd, 4th. 5th or 6th gear). The solenoid valve controls the flow of transmission fluid to the hydraulic valve that controls the system pressure in the transmission. Then the TCM compares the actual gear with the shift schedule in the TCM memory to detect shift solenoid valves and valve body mechanical problems.

OBDII Code P2808 2014 GMC Sierra - Transmission Control Solenoid Valve 7 Stuck Off - AutoCodes.com — P2808 2014 GMC Sierra Code - Transmission Control Solenoid Valve 7 Stuck Off

What does this mean?

What are the Possible Causes of the DTC P2808 2014 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 2014 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 2014 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 2014 GMC Sierra code?

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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 2014 GMC Sierra Code

1. What does the OBDII code P2808 mean on a 2014 GMC Sierra?

P2808 indicates that the Transmission Control Module (TCM) has detected that solenoid valve 7 in the transmission is stuck in the "off" position.

2. What are the symptoms of a P2808 code in a 2014 GMC Sierra?

Common symptoms include difficulty shifting gears, transmission slipping, harsh shifting, reduced fuel efficiency, or the vehicle going into limp mode.

3. What causes the P2808 code to appear?

Potential causes include a faulty transmission control solenoid, damaged or corroded wiring in the transmission circuit, low or dirty transmission fluid, or issues with the Transmission Control Module (TCM).

4. How can I fix the P2808 code on my 2014 GMC Sierra?

Repairs may involve replacing the faulty solenoid, fixing damaged wiring or connectors, flushing and refilling the transmission fluid, or reprogramming or replacing the TCM.

5. Can driving with a P2808 code damage my 2014 GMC Sierra?

Yes, continuing to drive with this issue can cause further damage to the transmission, leading to more expensive repairs if not addressed promptly.

6. How do I check if the transmission solenoid is faulty?

A mechanic can use a diagnostic tool to monitor the solenoid's operation and check for proper voltage and resistance levels in the circuit.

7. Does low transmission fluid cause the P2808 code?

Yes, low or dirty transmission fluid can affect solenoid operation and trigger the P2808 code. Ensure the fluid is at the proper level and in good condition.

8. Is the P2808 code specific to the 2014 GMC Sierra?

No, the P2808 code can appear on other vehicles as well, but the specific repair steps may vary depending on the make and model.

9. How much does it cost to fix a P2808 code?

Repair costs can range from $150 to $400 for solenoid replacement, but extensive transmission issues could cost significantly more.

10. Can I reset the P2808 code without fixing the issue?

Clearing the code without addressing the root cause may temporarily turn off the check engine light, but the code will likely return, and the transmission issues will persist.