AutoCodes – Buick – P15F4 Buick

P15F4 Buick Code - Drive Motor Torque Delivered Signal Message Counter Incorrect

Quick Answer

The Generator Control Module also called the Starter/Generator Control Module, is comprised of the following three control modules: the Hybrid/EV Powertrain Control Module 1, 14 V Power Module, and the Drive Motor Control Module. Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module circuit poor electrical connection. 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: P15F4 Buick indicates Drive Motor Torque Delivered Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 317

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 26, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P15F4 Buick Description

The Generator Control Module also called the Starter/Generator Control Module, is comprised of the following three control modules: the Hybrid/EV Powertrain Control Module 1, 14 V Power Module, and the Drive Motor Control Module. These three control modules are non-serviceable and are part of the Generator Control Module.
This is an internal fault detection of the Hybrid/EV Powertrain Control Module 1 and no external circuits are involved.
The Diagnostic Trouble Code (DTC) will be set when the Starter/Generator Control Module has detected an internal malfunction.

OBDII Code P15F4 Buick - Drive Motor Torque Delivered Signal Message Counter Incorrect - AutoCodes.com — P15F4 Buick Code - Drive Motor Torque Delivered Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P15F4 Buick?

Faulty Starter/Generator Control Module
Starter/Generator Control Module harness is open or shorted
Starter/Generator Control Module circuit poor electrical connection

How to Fix the DTC P15F4 Buick?

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 P15F4 Buick 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 P15F4 Buick code?

Need more information on how to fix the P15F4 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P15F4 Buick 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 P15F4 Buick Code

1. What does the OBDII code P15F4 mean for a Buick?

P15F4 indicates an issue with the drive motor torque delivered signal, specifically that the message counter is incorrect or inconsistent.

2. What are the common symptoms of the P15F4 code on a Buick?

Common symptoms include reduced power or performance, illuminated check engine light, and potential issues with the hybrid or electric drive system if applicable.

3. What causes the P15F4 code to appear?

This code is typically caused by a faulty drive motor control module, damaged wiring or connectors, or communication errors in the control system.

4. Can I drive my Buick with the P15F4 code active?

While it may be possible to drive, it is not recommended as the code can indicate reduced power or a potential safety issue with the motor control system.

5. How is the P15F4 code diagnosed?

A technician will use a scan tool to confirm the code, inspect wiring and connectors, and test the drive motor control module for proper communication.

6. What repairs are needed to fix the P15F4 code on a Buick?

Repairs may include replacing the drive motor control module, repairing or replacing damaged wiring, or updating the control module software.

7. How much does it cost to fix the P15F4 code on a Buick?

The cost varies depending on the specific issue but typically ranges from $200 to $1,500, with control module replacement being the most expensive.

8. Can a software update fix the P15F4 code?

In some cases, a software update to the drive motor control module can resolve the issue if it is caused by outdated programming.

9. Is the P15F4 code related to the hybrid or electric system in my Buick?

Yes, this code is often associated with hybrid or electric drive systems, as it relates to the drive motor torque signal.

10. What should I do if the P15F4 code keeps coming back after repairs?

If the code persists, have a qualified technician double-check the repairs, test related components, and ensure all system updates have been performed.