P27AA 2014 GMC Sierra Code - Transmission Control Solenoid Valve 4 Calibration Incorrect
Quick Answer
The P27AA diagnostic trouble code (DTC) specifically relates to the Transmission Control Solenoid Valve 4 Calibration being incorrect in a 2014 GMC Sierra. Common causes include Faulty transmission control solenoid valve 4, Electrical issues in the transmission control system, Mechanical problems within the transmission. 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
- P27AA 2014 GMC Sierra indicates Transmission Control Solenoid Valve 4 Calibration Incorrect.
- Common causes
- Common causes include Faulty transmission control solenoid valve 4, Electrical issues in the transmission control system, Mechanical problems within the transmission.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P27AA 2014 GMC Sierra Description
The P27AA diagnostic trouble code (DTC) specifically relates to the Transmission Control Solenoid Valve 4 Calibration being incorrect in a 2014 GMC Sierra. This code indicates that there is an issue with the calibration of the transmission control solenoid valve 4, which is responsible for controlling the flow of transmission fluid within the transmission system. The calibration being incorrect can lead to improper shifting patterns, decreased fuel efficiency, and potential damage to the transmission system if left unresolved.
Common Causes of P27AA 2014 GMC Sierra
- Faulty transmission control solenoid valve 4
- Electrical issues in the transmission control system
- Mechanical problems within the transmission
- Contaminated transmission fluid
- Wiring harness issues
Symptoms of P27AA 2014 GMC Sierra
- Erratic or harsh shifting
- Slipping gears
- Delayed engagement when shifting
- Decreased fuel efficiency
- Transmission failure
How to Fix P27AA 2014 GMC Sierra
- Diagnose the specific cause of the incorrect calibration by using a scan tool to read the DTC and perform a thorough inspection of the transmission system.
- Replace the faulty transmission control solenoid valve 4 with a new, properly calibrated one.
- Check and repair any electrical or wiring issues in the transmission control system.
- Flush and replace the transmission fluid to ensure it is clean and free of contaminants.
- Test drive the vehicle to verify that the transmission is operating correctly after the repair.
Cost to Fix P27AA 2014 GMC Sierra
The typical repair costs for addressing a P27AA code related to the Transmission Control Solenoid Valve 4 Calibration on a 2014 GMC Sierra can range from $200 to $500, including parts and labor. However, it is important to note that the actual cost may vary depending on the specific diagnosis time and labor rates at auto repair shops. Rates can be influenced by factors such as the location of the repair shop, the make and model of the vehicle, and the type of engine. It is advisable to inquire about local rates to obtain a more accurate estimate for this repair.
Need more information about the P27AA 2014 GMC Sierra code?
Need more information on how to fix the P27AA 2014 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P27AA 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P27AA 2014 GMC Sierra Code
1. What does the OBDII code P27AA mean on a 2014 GMC Sierra?
P27AA indicates that Transmission Control Solenoid Valve 4 has an incorrect calibration, meaning the transmission control module (TCM) detected a mismatch in the expected and actual operation of the solenoid.
2. What are the common symptoms of the P27AA code on a 2014 GMC Sierra?
Symptoms may include harsh or delayed shifting, slipping gears, reduced fuel efficiency, illuminated check engine light, and transmission performance issues.
3. What causes the P27AA code to appear on a 2014 GMC Sierra?
Common causes include a faulty transmission control solenoid, damaged wiring or connectors in the transmission circuit, low or contaminated transmission fluid, or a malfunctioning TCM.
4. Can driving with the P27AA code damage my 2014 GMC Sierra?
Yes, continuing to drive with this code can cause further damage to the transmission, leading to more costly repairs if not addressed promptly.
5. How is the P27AA code diagnosed?
A mechanic will use a scan tool to confirm the code, inspect the solenoid’s operation, check the wiring and connectors for damage, and evaluate the transmission fluid condition.
6. How do I fix the P27AA code on my 2014 GMC Sierra?
Repairs may include replacing the faulty transmission control solenoid, repairing damaged wiring, cleaning or replacing contaminated transmission fluid, or reprogramming the TCM.
7. Can low transmission fluid cause the P27AA code?
Yes, low or contaminated transmission fluid can result in improper solenoid operation and trigger the P27AA code.
8. How much does it cost to fix the P27AA code on a 2014 GMC Sierra?
The cost depends on the repair needed, ranging from $150–$400 for solenoid replacement to over $1,000 if TCM programming or more extensive transmission work is required.
9. Can I clear the P27AA code without fixing the issue?
Clearing the code without addressing the root cause will only temporarily remove it, and the problem is likely to reoccur, potentially worsening transmission damage.
10. Does the P27AA code require reprogramming the TCM?
In some cases, the TCM may require reprogramming or updating to resolve the calibration issue, especially if the solenoid and wiring are in proper working condition.
Discuss the causes and fixes for P27AA 2014 GMC Sierra OBDII Code
Code P27AA 2014 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.