AutoCodes – Chevrolet – P27AB 2016 Chevrolet Silverado

P27AB 2016 Chevrolet Silverado 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 2016 Chevrolet Silverado 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 350

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 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 P27AB 2016 Chevrolet Silverado - Transmission Control Solenoid Valve 5 Calibration Incorrect - AutoCodes.com — P27AB 2016 Chevrolet Silverado Code - Transmission Control Solenoid Valve 5 Calibration Incorrect

What does this mean?

What are the Possible Causes of the DTC P27AB 2016 Chevrolet Silverado?

Solenoid Valve Characterization Reprogramming

How to Fix the DTC P27AB 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 P27AB 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 P27AB 2016 Chevrolet Silverado code?

Need more information on how to fix the P27AB 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the 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 P27AB 2016 Chevrolet Silverado Code

What does the OBDII code P27AB mean for a 2016 Chevrolet Silverado?

The OBDII code P27AB indicates that there is a calibration issue with Transmission Control Solenoid Valve 5, which can affect the transmission's shifting performance.

What are common symptoms of the P27AB code in a Chevrolet Silverado?

Common symptoms include harsh or erratic shifting, delayed engagement, slipping transmission, and the illumination of the check engine light.

What could cause the P27AB code to trigger?

Causes may include a faulty transmission control solenoid, wiring issues, poor electrical connections, or a problem with the transmission control module (TCM) software.

Can driving with the P27AB code cause further damage?

Yes, driving with this code can lead to transmission damage due to improper shifting and overheating, so it's advisable to address the issue promptly.

How can I diagnose the P27AB code?

To diagnose the P27AB code, you can use an OBDII scanner to retrieve the code and any related codes, inspect the transmission control solenoid and wiring, and check for any software updates for the TCM.

What repairs might be needed if the P27AB code is present?

Repairs may include replacing the faulty transmission control solenoid, repairing wiring or connectors, or reprogramming or replacing the transmission control module.

Is it safe to clear the P27AB code without making repairs?

While you can clear the code, it's not advisable to ignore the underlying issue as it may lead to transmission problems if not addressed.

How much does it typically cost to fix the P27AB code?

Repair costs can vary widely based on the cause; simple fixes like replacing the solenoid may cost a few hundred dollars, while more extensive repairs involving the TCM could cost significantly more.

Will the P27AB code affect my vehicle's fuel efficiency?

Yes, transmission issues can lead to decreased fuel efficiency due to improper shifting and increased engine load, so resolving the code can help restore optimal fuel economy.