AutoCodes – Chevrolet – P27AC 2016 Chevrolet Silverado

P27AC 2016 Chevrolet Silverado Code - Transmission Control Solenoid Valve 6 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: P27AC 2016 Chevrolet Silverado indicates Transmission Control Solenoid Valve 6 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 322

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 P27AC 2016 Chevrolet Silverado 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 P27AC 2016 Chevrolet Silverado - Transmission Control Solenoid Valve 6 Calibration Incorrect - AutoCodes.com — P27AC 2016 Chevrolet Silverado Code - Transmission Control Solenoid Valve 6 Calibration Incorrect

What does this mean?

What are the Possible Causes of the DTC P27AC 2016 Chevrolet Silverado?

Solenoid Valve Characterization Reprogramming

How to Fix the DTC P27AC 2016 Chevrolet Silverado?

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 P27AC 2016 Chevrolet Silverado 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 P27AC 2016 Chevrolet Silverado code?

Need more information on how to fix the P27AC 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P27AC 2016 Chevrolet Silverado 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 P27AC 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P27AC in a 2016 Chevrolet Silverado?

The common symptoms include rough shifting, transmission slipping, hesitation during acceleration, and illuminated check engine light.

2. What does the OBDII code P27AC indicate in a 2016 Chevrolet Silverado?

The code P27AC indicates that the Transmission Control Solenoid Valve 6 Calibration is incorrect in the vehicle's transmission system.

3. What are the possible causes of OBDII code P27AC in a 2016 Chevrolet Silverado?

Possible causes of code P27AC can include a faulty transmission control solenoid, issues with the transmission control module, wiring problems, or software/calibration errors.

4. How can I diagnose the OBDII code P27AC in my 2016 Chevrolet Silverado?

Diagnosing code P27AC typically involves using an OBDII scanner to retrieve the code, checking the transmission control solenoid valve 6 for proper operation, inspecting wiring for damage, and verifying software updates.

5. Can I continue driving my 2016 Chevrolet Silverado with OBDII code P27AC?

It's not recommended to continue driving with code P27AC present, as it can lead to further transmission issues and potential damage. It's best to address the problem promptly.

6. How can I repair OBDII code P27AC in my 2016 Chevrolet Silverado?

Repairing code P27AC may involve replacing the Transmission Control Solenoid Valve 6, addressing any wiring issues, updating software/calibrations, or seeking professional help for further diagnosis and repair.

7. Is it possible to reset OBDII code P27AC in a 2016 Chevrolet Silverado?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing code P27AC is not addressed, the code is likely to reappear. It's best to diagnose and repair the problem.

8. Can a DIY enthusiast fix OBDII code P27AC in a 2016 Chevrolet Silverado?

While some aspects of diagnosing and repairing code P27AC can be tackled by a DIY enthusiast, dealing with transmission-related issues may require specialized tools and expertise. Seeking professional help is advisable.

9. How much does it cost to repair OBDII code P27AC in a 2016 Chevrolet Silverado?

The cost of repairing code P27AC can vary depending on the exact cause of the issue, parts needed, labor costs, and whether you choose to address the problem yourself or seek assistance from a mechanic.

10. Will ignoring OBDII code P27AC cause further damage to my 2016 Chevrolet Silverado?

Ignoring code P27AC can lead to potential transmission problems, reduced performance, and increased risk of more costly repairs down the line. It's important to address the issue promptly to prevent further damage.