P27A8 2014 GMC Sierra Code - Transmission Control Solenoid Valve 2 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
- P27A8 2014 GMC Sierra indicates Transmission Control Solenoid Valve 2 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 P27A8 2014 GMC Sierra Description
What are the Possible Causes of the DTC P27A8 2014 GMC Sierra?
- Solenoid Valve Characterization Reprogramming
How to Fix the DTC P27A8 2014 GMC Sierra?
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 P27A8 2014 GMC Sierra 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.
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Frequently Asked Questions about P27A8 2014 GMC Sierra Code
1. What does the OBDII code P27A8 mean for a 2014 GMC Sierra?
The P27A8 code indicates that the Transmission Control Module (TCM) has detected an issue with the calibration of Transmission Control Solenoid Valve 2.
2. What are the common symptoms of the P27A8 code in a 2014 GMC Sierra?
Symptoms may include erratic shifting, transmission slipping, reduced fuel efficiency, or the vehicle entering "limp" mode.
3. What causes the P27A8 code to appear on a 2014 GMC Sierra?
This code can be caused by issues such as a faulty solenoid valve, outdated TCM software, damaged wiring, or low transmission fluid levels.
4. Can I drive my 2014 GMC Sierra with the P27A8 code?
It is not recommended to drive the vehicle for an extended period, as it may cause further damage to the transmission or leave you stranded.
5. How can I fix the P27A8 code on my 2014 GMC Sierra?
Repairs may include updating the TCM software, replacing the faulty solenoid valve, inspecting and repairing wiring, or ensuring proper transmission fluid levels.
6. How is the P27A8 code diagnosed on a 2014 GMC Sierra?
A technician will use a scan tool to verify the code, check transmission fluid levels, inspect wiring and connections, and test the solenoid and TCM.
7. What is a Transmission Control Solenoid Valve?
The solenoid valve controls the flow of transmission fluid to manage gear shifts and ensure proper transmission operation.
8. Can low transmission fluid trigger the P27A8 code?
Yes, low or contaminated transmission fluid can contribute to solenoid calibration issues, potentially triggering the P27A8 code.
9. Does the P27A8 code require TCM reprogramming?
In some cases, reprogramming or updating the TCM software may resolve the issue if it is related to calibration errors.
10. What is the cost to repair the P27A8 code on a 2014 GMC Sierra?
Repair costs can vary but may range from $150 to $500 depending on whether it involves software updates, solenoid replacement, or wiring repairs.
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