Engine-Codes.com
Engine-Codes – GMC – P15F2 2015 GMC Sierra

P15F2 2015 GMC Sierra Code - Engine Torque Command Signal Message Counter Incorrect

Quick Answer

The P15F2 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that there is an issue with the Engine Torque Command Signal Message Counter being incorrect. Common causes include Faulty wiring or connectors between the ECM and TCM, Malfunctioning torque sensor or throttle position sensor, Software glitch in the ECM or TCM. 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
P15F2 2015 GMC Sierra indicates Engine Torque Command Signal Message Counter Incorrect.
Common causes
Common causes include Faulty wiring or connectors between the ECM and TCM, Malfunctioning torque sensor or throttle position sensor, Software glitch in the ECM or TCM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P15F2 2015 GMC Sierra Description

The P15F2 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that there is an issue with the Engine Torque Command Signal Message Counter being incorrect. This code typically points to a problem with the communication between the engine control module (ECM) and the transmission control module (TCM). The ECM sends a torque command to the TCM, which controls the transmission shifting based on the engine load and conditions. When the message counter is incorrect, it means that the TCM is not receiving the correct number of torque commands from the ECM, leading to potential issues with the transmission shifting properly.

OBDII Code P15F2 2015 GMC Sierra - Engine Torque Command Signal Message Counter Incorrect
P15F2 2015 GMC Sierra Code - Engine Torque Command Signal Message Counter Incorrect

Common Causes of P15F2 2015 GMC Sierra

  1. Faulty wiring or connectors between the ECM and TCM
  2. Malfunctioning torque sensor or throttle position sensor
  3. Software glitch in the ECM or TCM
  4. Electronic control module (ECM) or transmission control module (TCM) failure
  5. Poor electrical connection or ground issues

Symptoms of P15F2 2015 GMC Sierra

  1. Erratic shifting or delayed gear changes
  2. Reduced acceleration and power
  3. Check Engine Light illuminated on the dashboard
  4. Reduced fuel efficiency
  5. Harsh shifting or slipping gears

How to Fix P15F2 2015 GMC Sierra

  1. Perform a thorough diagnostic scan using a professional OBD-II scanner to retrieve the specific trouble codes and identify the root cause of the issue.
  2. Inspect the wiring harness and connectors between the ECM and TCM for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the torque sensor and throttle position sensor for proper functionality. Replace if faulty.
  4. Update the software in both the ECM and TCM to the latest versions provided by the manufacturer.
  5. If all else fails, consider replacing the ECM or TCM with new units to ensure proper communication between the engine and transmission systems.

Cost to Fix P15F2 2015 GMC Sierra

The typical repair costs for addressing the P15F2 code on a 2015 GMC Sierra can vary depending on the severity of the issue and the specific components that need to be replaced. On average, the parts for this repair can range from $200 to $800, while the labor costs can add another $100 to $300 to the total bill. With an average labor rate of $80 to $150 per hour, the total repair cost can fall between $300 and $1100. However, it is essential to note that these estimates are rough approximations, and the actual costs may vary based on the location, dealership rates, and the complexity of the repair process. It is recommended to consult with a professional mechanic or auto repair shop for a more accurate cost estimate tailored to your specific vehicle and situation.

Need more information about the P15F2 2015 GMC Sierra code?

Need more information on how to fix the P15F2 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P15F2 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P15F2 2015 GMC Sierra Code

1. What does the OBDII code P15F2 mean on a 2015 GMC Sierra?

P15F2 indicates an "Engine Torque Command Signal Message Counter Incorrect" issue, often related to communication errors between the engine control module (ECM) and other vehicle systems.

2. What are the symptoms of code P15F2 in a 2015 GMC Sierra?

Common symptoms include reduced engine performance, the check engine light turning on, and occasional transmission shifting issues.

3. What causes the P15F2 code to appear?

The code can be caused by faulty wiring, issues with the ECM, a malfunctioning powertrain control module (PCM), or corrupted data signals.

4. Can I drive my 2015 GMC Sierra with the P15F2 code?

It is not recommended to drive for extended periods, as the issue can affect engine performance and lead to further damage if not addressed.

5. How do I diagnose the P15F2 code on my GMC Sierra?

Perform a visual inspection of the wiring and connectors, scan for other related codes, and check for communication issues between the ECM and PCM.

6. What repairs are typically needed to fix the P15F2 code?

Repairs may include fixing or replacing damaged wiring, updating or reprogramming the ECM or PCM, or replacing a malfunctioning module.

7. Can a software update fix the P15F2 code?

Yes, in some cases a software update or reprogramming of the ECM or PCM can resolve the issue if it’s related to corrupted data or outdated software.

8. How much does it cost to fix the P15F2 code on a 2015 GMC Sierra?

Repair costs can range from $100 for minor wiring repairs to over $1,000 if module replacement or extensive diagnostics are required.

9. Is the P15F2 code related to other engine or transmission codes?

It can be, as it involves communication between the ECM and other control modules. Additional codes may help pinpoint the root cause.

10. What tools are needed to diagnose and fix the P15F2 code?

You'll need an OBDII scanner, a multimeter to test wiring, and potentially manufacturer-specific diagnostic tools for reprogramming or module testing.

Discuss the causes and fixes for P15F2 2015 GMC Sierra OBDII Code

Submit a New Comment

Code P15F2 2015 GMC Sierra comments

No comments found for this page.