P27AC 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 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 Description
What are the Possible Causes of the DTC P27AC?
- Solenoid Valve Characterization Reprogramming
How to Fix the DTC P27AC?
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 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 code?
Need more information on how to fix the P27AC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P27AC code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P27AC Buick — Transmission Control Solenoid Valve 6 Calibration Incorrect
- P27AC Cadillac — Transmission Control Solenoid Valve 6 Calibration Incorrect
- P27AC Chevrolet — Transmission Control Solenoid Valve 6 Calibration Incorrect
- P27AC GMC — Transmission Control Solenoid Valve 6 Calibration Incorrect
Frequently Asked Questions about P27AC Code
1. What are the common symptoms of OBDII code P27AC?
Symptoms may include rough shifting, hesitation when changing gears, illuminated Check Engine Light, and decreased fuel efficiency.
2. What can cause the OBDII code P27AC to trigger?
This code typically triggers when the Transmission Control Solenoid Valve 6 is not calibrated correctly, which can be due to electrical issues, mechanical problems, or software glitches.
3. How serious is the P27AC code?
While the vehicle may still be drivable with this code present, it is important to address it promptly to prevent potential damage to the transmission system and ensure optimal vehicle performance.
4. Can I continue driving my vehicle with the P27AC code?
It is not recommended to ignore the P27AC code and continue driving, as unresolved transmission issues can lead to further damage and more costly repairs down the line.
5. How can I diagnose the cause of the P27AC code?
Diagnosing the cause of this code typically involves conducting a thorough inspection of the Transmission Control Solenoid Valve 6, checking for wiring issues, and performing a calibration test using diagnostic equipment.
6. What are the repair options for the P27AC code?
Repair options may include recalibrating the Transmission Control Solenoid Valve 6, repairing or replacing damaged wiring, updating the transmission control module software, or seeking professional assistance from a mechanic.
7. Can I fix the P27AC code myself?
Depending on your automotive repair skills and access to diagnostic tools, you may be able to address the P27AC code yourself by following repair guides or consulting with experts for guidance.
8. How much does it cost to repair the P27AC code?
The cost of repairing the P27AC code can vary widely depending on the extent of the issue, the necessary repairs or replacements, labor costs, and whether you choose to address the problem yourself or seek professional help.
9. Is the P27AC code common in specific vehicle makes or models?
While this code can potentially occur in various vehicles with OBDII systems, it may be more common in specific makes or models known for transmission issues or solenoid valve calibration problems.
10. How can I prevent the P27AC code from recurring?
Regular maintenance, timely transmission fluid changes, and addressing any underlying electrical or mechanical issues promptly can help prevent the reoccurrence of the P27AC code.
Discuss the causes and fixes for P27AC OBDII Code
Code P27AC 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.
