AutoCodes – Chevrolet – P27AD 2018 Chevrolet Silverado

P27AD 2018 Chevrolet Silverado Code - Transmission Control Solenoid Valve 7 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: P27AD 2018 Chevrolet Silverado indicates Transmission Control Solenoid Valve 7 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 229

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 P27AD 2018 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 P27AD 2018 Chevrolet Silverado - Transmission Control Solenoid Valve 7 Calibration Incorrect - AutoCodes.com — P27AD 2018 Chevrolet Silverado Code - Transmission Control Solenoid Valve 7 Calibration Incorrect

What does this mean?

What are the Possible Causes of the DTC P27AD 2018 Chevrolet Silverado?

Solenoid Valve Characterization Reprogramming

How to Fix the DTC P27AD 2018 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 P27AD 2018 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 P27AD 2018 Chevrolet Silverado code?

Need more information on how to fix the P27AD 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P27AD 2018 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 P27AD 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P27AD in a 2018 Chevrolet Silverado?

- Common symptoms include rough shifting, transmission slipping, reduced fuel efficiency, and the check engine light illuminating.

2. What does the OBDII code P27AD indicate in a 2018 Chevrolet Silverado?

- The code indicates that the Transmission Control Solenoid Valve 7 Calibration is Incorrect.

3. What are the possible causes of OBDII code P27AD in a 2018 Chevrolet Silverado?

- Possible causes include a faulty transmission control solenoid valve, wiring issues, low transmission fluid, or a software glitch.

4. How can I diagnose OBDII code P27AD in my 2018 Chevrolet Silverado?

- Diagnosing the code typically involves using an OBDII scanner to retrieve the code, checking transmission fluid levels, inspecting wiring connections, and testing the solenoid valve.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P27AD?

- It is not recommended to continue driving with this code 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 P27AD in my 2018 Chevrolet Silverado?

- Repairing the code may involve replacing the Transmission Control Solenoid Valve 7, addressing any wiring issues, ensuring proper fluid levels, and resetting the transmission control module.

7. Is it possible to reset OBDII code P27AD in a 2018 Chevrolet Silverado without repairs?

- While clearing the code with a scanner may temporarily turn off the check engine light, it's crucial to address the underlying issue to prevent further transmission problems.

8. Can a DIY enthusiast tackle the repair of OBDII code P27AD in a 2018 Chevrolet Silverado?

- Depending on your skill level and access to tools, DIY enthusiasts may be able to address simpler causes like checking fluid levels or inspecting connections. For more complex issues, professional help is recommended.

9. How much does it typically cost to repair OBDII code P27AD in a 2018 Chevrolet Silverado?

- The cost of repair can vary based on the exact cause of the code and labor rates. It's advisable to get quotes from reputable mechanics or dealerships for an accurate estimate.

10. Will OBDII code P27AD cause permanent damage to the transmission of a 2018 Chevrolet Silverado if left unaddressed?

- Ignoring the code can potentially lead to further transmission damage over time, so it's best to address the issue promptly to prevent costly repairs in the future.