AutoCodes – Cadillac – P27AC Cadillac

P27AC Cadillac 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 Cadillac 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 434
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 22, 2022
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Code P27AC Cadillac 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 P27AC Cadillac - Transmission Control Solenoid Valve 6 Calibration Incorrect - AutoCodes.com
P27AC Cadillac Code - Transmission Control Solenoid Valve 6 Calibration Incorrect

What are the Possible Causes of the DTC P27AC Cadillac?

  • Solenoid Valve Characterization Reprogramming

How to Fix the DTC P27AC Cadillac?

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 Cadillac 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 Cadillac code?

Need more information on how to fix the P27AC Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P27AC Cadillac Code

1. What are the common symptoms of OBDII code P27AC in a Cadillac related to Transmission Control Solenoid Valve 6 Calibration Incorrect?

- Common symptoms include rough shifting, hesitation or delays in gear shifting, decreased fuel efficiency, and illuminated Check Engine Light.

2. What are the possible causes of OBDII code P27AC in a Cadillac indicating Transmission Control Solenoid Valve 6 Calibration Incorrect?

- The code can be triggered by issues such as a faulty transmission control solenoid valve, electrical problems in the transmission system, or calibration errors in the valve itself.

3. How can I diagnose OBDII code P27AC in my Cadillac related to Transmission Control Solenoid Valve 6 Calibration Incorrect?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the transmission control solenoid valve, checking for any wiring issues, and verifying calibration settings.

4. Can driving with OBDII code P27AC in a Cadillac indicating Transmission Control Solenoid Valve 6 Calibration Incorrect cause further damage?

- Continuing to drive with this code may lead to further transmission issues such as gear slippage, overheating, or total transmission failure. It is recommended to address the problem promptly.

5. What are the repair options for OBDII code P27AC in a Cadillac related to Transmission Control Solenoid Valve 6 Calibration Incorrect?

- Repair options may include replacing the transmission control solenoid valve, repairing any damaged wiring, recalibrating the valve, or seeking professional assistance from a mechanic.

6. Are there any DIY tips for addressing OBDII code P27AC in a Cadillac indicating Transmission Control Solenoid Valve 6 Calibration Incorrect?

- While some basic troubleshooting like checking for loose connections or damaged wires can be done by DIY enthusiasts, complex repairs or recalibration should be left to experienced professionals.

7. How much does it typically cost to repair OBDII code P27AC in a Cadillac related to Transmission Control Solenoid Valve 6 Calibration Incorrect?

- The cost of repair can vary depending on the underlying issue, parts needed, labor rates, and whether the repair is done at a dealership or an independent mechanic. It's advisable to get estimates from multiple sources.

8. Can resetting the OBDII code P27AC in a Cadillac indicating Transmission Control Solenoid Valve 6 Calibration Incorrect temporarily resolve the issue?

- Resetting the code may temporarily turn off the Check Engine Light, but if the root cause of the problem is not addressed, the code is likely to reappear once the issue persists.

9. How urgent is it to address OBDII code P27AC in a Cadillac related to Transmission Control Solenoid Valve 6 Calibration Incorrect?

- It is recommended to address this code promptly to prevent potential transmission damage and ensure the vehicle operates safely and efficiently.

10. Is OBDII code P27AC specific to Cadillac vehicles, or can it occur in other car brands as well?

- While this specific code may be more common in Cadillac vehicles, similar issues related to transmission control solenoid valves and calibration errors can occur in other car brands too.

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