AutoCodes – Chevrolet – P27AB Chevrolet

P27AB Chevrolet 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 Chevrolet 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 393

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

What does this mean?

What are the Possible Causes of the DTC P27AB Chevrolet?

Solenoid Valve Characterization Reprogramming

How to Fix the DTC P27AB Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the P27AB Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P27AB 2014 Chevrolet Silverado — Transmission Control Solenoid Valve 5 Calibration Incorrect
P27AB 2015 Chevrolet Silverado — Transmission Control Solenoid Valve 5 Calibration Incorrect
P27AB 2016 Chevrolet Silverado — Transmission Control Solenoid Valve 5 Calibration Incorrect
P27AB 2017 Chevrolet Silverado — Transmission Control Solenoid Valve 5 Calibration Incorrect
P27AB 2018 Chevrolet Silverado — Transmission Control Solenoid Valve 5 Calibration Incorrect

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 Chevrolet Code

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

The common symptoms include harsh shifting, transmission slipping, poor acceleration, and the transmission getting stuck in a certain gear.

2. What can cause the OBDII code P27AB in a Chevrolet related to Transmission Control Solenoid Valve 5 Calibration Incorrect?

The code P27AB can be triggered by issues such as a faulty transmission control solenoid valve, damaged wiring or connectors, low transmission fluid levels, or a malfunctioning transmission control module.

3. How serious is the OBDII code P27AB related to Transmission Control Solenoid Valve 5 Calibration Incorrect in a Chevrolet?

Ignoring the code P27AB can lead to further damage to the transmission system, potentially causing transmission failure and leaving the vehicle undrivable. It is recommended to address this issue promptly.

4. What should I do if my Chevrolet is showing the OBDII code P27AB related to Transmission Control Solenoid Valve 5 Calibration Incorrect?

If you encounter this code, it is advisable to have your vehicle diagnosed by a qualified mechanic to determine the exact cause of the issue. Repairs may involve replacing the faulty solenoid valve, addressing wiring issues, or recalibrating the transmission control module.

5. Can I continue driving my Chevrolet with the OBDII code P27AB related to Transmission Control Solenoid Valve 5 Calibration Incorrect?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further transmission problems. It is best to have the issue resolved as soon as possible to prevent additional damage.

6. How can I prevent the OBDII code P27AB related to Transmission Control Solenoid Valve 5 Calibration Incorrect in my Chevrolet?

Regular maintenance of the transmission system, including checking fluid levels and addressing any issues promptly, can help prevent the occurrence of this code. Additionally, driving gently and avoiding harsh acceleration can also help prolong the life of the transmission components.

7. Is it possible to reset the OBDII code P27AB related to Transmission Control Solenoid Valve 5 Calibration Incorrect in a Chevrolet?

Resetting the code without addressing the underlying issue is not recommended, as the problem will likely reoccur. It is advisable to diagnose and repair the root cause of the code to ensure proper functioning of the transmission system.

8. How much does it typically cost to repair the OBDII code P27AB related to Transmission Control Solenoid Valve 5 Calibration Incorrect in a Chevrolet?

The cost of repairs for this code can vary depending on the exact cause of the issue, the extent of the damage, and labor rates in your area. It is recommended to obtain quotes from different mechanics to compare prices before proceeding with the repairs.

9. Can a DIY enthusiast fix the OBDII code P27AB related to Transmission Control Solenoid Valve 5 Calibration Incorrect in a Chevrolet?

While some experienced DIY enthusiasts may be able to address this issue, it is generally recommended to have a qualified mechanic diagnose and repair problems related to the transmission system to ensure proper and safe repairs.

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

The repair time can vary depending on the specific cause of the code and the extent of the repairs needed. In some cases, simple fixes like replacing a solenoid valve may take a few hours, while more complex issues could require a day or more to resolve.