P27AC 2018 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 2018 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.
Code P27AC 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC P27AC 2018 Chevrolet Silverado?
- Solenoid Valve Characterization Reprogramming
How to Fix the DTC P27AC 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 P27AC 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 P27AC 2018 Chevrolet Silverado code?
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Frequently Asked Questions about P27AC 2018 Chevrolet Silverado Code
What does the OBDII code P27AC mean for a 2018 Chevrolet Silverado?
P27AC indicates that the Transmission Control Solenoid Valve 6 has an incorrect calibration, which may affect the operation of the vehicle's transmission system.
What are the common symptoms of the P27AC code on a 2018 Chevrolet Silverado?
Symptoms may include harsh or delayed shifting, transmission slipping, reduced fuel efficiency, or the illumination of the check engine light.
What causes the P27AC code to appear?
This code can be caused by a faulty transmission solenoid, incorrect calibration data, damaged wiring or connectors, or issues within the transmission control module (TCM).
Can I drive my 2018 Chevrolet Silverado with the P27AC code?
Driving with this code may be possible, but it’s not recommended as it could lead to further transmission damage or unsafe driving conditions.
How is the P27AC code diagnosed?
A mechanic will use an OBDII scanner to confirm the code, inspect the solenoid and its wiring, check for TCM updates, and test the transmission system for proper operation.
Can the P27AC code be fixed without replacing parts?
In some cases, reprogramming or updating the TCM software may resolve the issue without replacing any components.
How much does it cost to repair the P27AC code?
Repair costs can vary but may range from $200 to $600, depending on whether the solenoid needs replacement or if only reprogramming is required.
What tools are needed to fix the P27AC code?
Common tools include an OBDII scanner, a multimeter for electrical testing, and possibly a transmission fluid pressure gauge for further diagnostics.
Is a software update always required for the P27AC code?
Not always. While a software update may fix the issue in some cases, the problem could also stem from a faulty solenoid or damaged wiring.
Can low transmission fluid cause the P27AC code?
Low transmission fluid is unlikely to directly cause this code but can lead to other transmission issues that might exacerbate the problem.
Discuss the causes and fixes for P27AC 2018 Chevrolet Silverado OBDII Code
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