AutoCodes – GMC – P27AB 2015 GMC Sierra

P27AB 2015 GMC Sierra Code - Transmission Control Solenoid Valve 5 Calibration Incorrect

Quick Answer

The Transmission Control Solenoid Valve 1, 2, 3, 4, 5, 6, 7 have a unique current versus oil pressure characteristic that is used to properly upshift or downshift the transmission. Common causes include Solenoid Valve Characterization Reprogramming. 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: P27AB 2015 GMC Sierra indicates Transmission Control Solenoid Valve 5 Calibration Incorrect.
Common causes: Common causes include Solenoid Valve Characterization Reprogramming.
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 279

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 Sep 22, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P27AB 2015 GMC Sierra Description

The Transmission Control Solenoid Valve 1, 2, 3, 4, 5, 6, 7 have a unique current versus oil pressure characteristic that is used to properly upshift or downshift the transmission. The data for each solenoid valve is programmed into the Transmission Control Module (TCM). The Diagnostic Trouble Code (DTC) will be set when the Transmission Control Solenoid Valve Calibration Data has not been programmed.

OBDII Code P27AB 2015 GMC Sierra - Transmission Control Solenoid Valve 5 Calibration Incorrect - AutoCodes.com — P27AB 2015 GMC Sierra Code - Transmission Control Solenoid Valve 5 Calibration Incorrect

What does this mean?

What are the Possible Causes of the DTC P27AB 2015 GMC Sierra?

Solenoid Valve Characterization Reprogramming

How to Fix the DTC P27AB 2015 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 P27AB 2015 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 P27AB 2015 GMC Sierra code?

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Need Help with the Code?

Get the P27AB 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P27AB 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P27AB in a 2015 GMC Sierra related to Transmission Control Solenoid Valve 5 Calibration Incorrect?

- Common symptoms include rough shifting, transmission slipping, poor acceleration, and illuminated check engine light.

2. What can cause the OBDII code P27AB to trigger in a 2015 GMC Sierra?

- The code P27AB can be triggered due to a faulty Transmission Control Solenoid Valve 5, wiring issues, or calibration errors.

3. How can I diagnose the OBDII code P27AB in my 2015 GMC Sierra?

- A thorough diagnostic process involving checking the transmission control solenoid, inspecting wiring connections, and performing calibration checks is necessary to diagnose the code.

4. Can I drive my 2015 GMC Sierra with the OBDII code P27AB present?

- It is not recommended to continue driving the vehicle with the code P27AB as it can lead to further transmission issues and potential damage.

5. How can I repair the OBDII code P27AB related to Transmission Control Solenoid Valve 5 Calibration Incorrect in my 2015 GMC Sierra?

- Repair typically involves replacing the faulty Transmission Control Solenoid Valve 5, fixing any wiring problems, and recalibrating the system.

6. Is it possible to reset the OBDII code P27AB in a 2015 GMC Sierra without repairing the issue?

- While clearing the code may temporarily turn off the check engine light, the underlying issue causing the code will persist and could lead to more severe problems if left unresolved.

7. Are there any DIY methods to fix the OBDII code P27AB in a 2015 GMC Sierra?

- DIY repair is not recommended for this code as it involves complex transmission components and calibration procedures best handled by a professional mechanic.

8. How much does it typically cost to repair the OBDII code P27AB in a 2015 GMC Sierra at a mechanic or dealership?

- Repair costs can vary depending on the extent of the issue, but expect to pay for parts, labor, and potentially recalibration procedures, which can range from a few hundred to over a thousand dollars.

9. Can a faulty Transmission Control Solenoid Valve 5 cause other OBDII codes to appear in a 2015 GMC Sierra?

- Yes, a malfunctioning Transmission Control Solenoid Valve 5 can cause other transmission-related codes to trigger, indicating a broader issue with the transmission system.

10. How long does it take to repair the OBDII code P27AB related to Transmission Control Solenoid Valve 5 Calibration Incorrect in a 2015 GMC Sierra?

- The repair time can vary depending on the mechanic's workload, availability of parts, and the complexity of the repair, but it typically takes a few hours to a full day to complete the repair.