Engine-CodesChevrolet – P27AB 2017 Chevrolet Silverado

P27AB 2017 Chevrolet Silverado Code - Transmission Control Solenoid Valve 5 Calibration Incorrect

Quick Answer

The P27AB diagnostic trouble code for a 2017 Chevrolet Silverado indicates that there is a calibration error in Transmission Control Solenoid Valve 5. Common causes include Faulty Transmission Control Solenoid Valve 5, Wiring issues in the transmission system, Transmission Control Module malfunction. 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 2017 Chevrolet Silverado indicates Transmission Control Solenoid Valve 5 Calibration Incorrect.
Common causes
Common causes include Faulty Transmission Control Solenoid Valve 5, Wiring issues in the transmission system, Transmission Control Module malfunction.
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.
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P27AB 2017 Chevrolet Silverado Description

The P27AB diagnostic trouble code for a 2017 Chevrolet Silverado indicates that there is a calibration error in Transmission Control Solenoid Valve 5. The transmission control solenoid valves are responsible for regulating the flow of transmission fluid throughout the transmission system. Solenoid Valve 5 specifically controls the flow of fluid to specific components within the transmission. When the calibration of this solenoid valve is incorrect, it can lead to various transmission issues and affect the vehicle's performance.

OBDII Code P27AB 2017 Chevrolet Silverado - Transmission Control Solenoid Valve 5 Calibration Incorrect
P27AB 2017 Chevrolet Silverado Code - Transmission Control Solenoid Valve 5 Calibration Incorrect

Common Causes of P27AB 2017 Chevrolet Silverado

  1. Faulty Transmission Control Solenoid Valve 5
  2. Wiring issues in the transmission system
  3. Transmission Control Module malfunction
  4. Software glitch in the transmission control system

Symptoms of P27AB 2017 Chevrolet Silverado

  1. Erratic shifting patterns
  2. Harsh gear shifts
  3. Delayed engagement when shifting gears
  4. Transmission slipping
  5. Check Engine Light illuminated

How to Fix P27AB 2017 Chevrolet Silverado

  1. Diagnose the root cause of the calibration error by performing a thorough inspection of the transmission system.
  2. Test the Transmission Control Solenoid Valve 5 to determine if it is functioning correctly.
  3. Check the wiring and connections in the transmission system for any faults or damage.
  4. If necessary, re-calibrate or replace the Transmission Control Solenoid Valve 5.
  5. Clear the error code from the vehicle's system and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P27AB 2017 Chevrolet Silverado

The typical repair costs for addressing a Transmission Control Solenoid Valve 5 calibration error can range from $200 to $500, including parts and labor. However, it is essential to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is advisable to check local rates for a more accurate estimate.

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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 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P27AB in a 2017 Chevrolet Silverado?

The common symptoms include harsh shifting, transmission slipping, decreased fuel efficiency, and the transmission going into limp mode.

2. What can cause the OBDII code P27AB to trigger in a 2017 Chevrolet Silverado?

The code P27AB typically triggers when the Transmission Control Solenoid Valve 5 calibration is incorrect, indicating a problem with the transmission control system.

3. How serious is OBDII code P27AB in a 2017 Chevrolet Silverado?

Code P27AB should not be ignored, as it can lead to further transmission issues if left unresolved. It is recommended to address this code promptly to prevent potential damage to the transmission.

4. How can I diagnose the OBDII code P27AB in my 2017 Chevrolet Silverado?

Diagnosing code P27AB requires using an OBDII scanner to read the code and further troubleshooting the transmission control system to identify the exact cause of the calibration error.

5. Can I continue driving my 2017 Chevrolet Silverado with OBDII code P27AB?

It is not recommended to drive the vehicle with code P27AB present, as it can cause further damage to the transmission. It's best to address the issue as soon as possible.

6. What are the possible repair options for OBDII code P27AB in a 2017 Chevrolet Silverado?

Repair options may include recalibrating the Transmission Control Solenoid Valve 5, replacing the solenoid valve, checking and repairing wiring connections, or reprogramming the transmission control module.

7. How much does it typically cost to repair OBDII code P27AB in a 2017 Chevrolet Silverado?

The cost of repairing code P27AB can vary depending on the specific cause of the issue and the repair needed. Costs may range from a simple recalibration to replacing components, potentially costing a few hundred to a thousand dollars.

8. Can I reset the OBDII code P27AB in my 2017 Chevrolet Silverado myself?

While you can clear the code using an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring. Resetting the code without fixing the problem will not solve the issue.

9. Is OBDII code P27AB covered under warranty for a 2017 Chevrolet Silverado?

Depending on the vehicle's warranty status and coverage, repairs related to code P27AB may be covered under the manufacturer's warranty. It's advisable to check with a Chevrolet dealership or refer to your warranty documentation.

10. How can I prevent OBDII code P27AB from occurring in my 2017 Chevrolet Silverado?

Regular maintenance of the transmission system, including fluid checks and changes, can help prevent issues leading to code P27AB. Additionally, addressing any transmission-related symptoms promptly can help prevent this code from occurring.

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