AutoCodes – GMC – P15F9 2014 GMC Sierra

P15F9 2014 GMC Sierra Code - Hybrid/EV System Engine Speed Control Intervention Request Type Signal Message Counter Incorrect

Quick Answer

The Hybrid Powertrain Control Module is constantly sending serial data messages to the Engine Control Module (ECM) regarding the operating state of the powertrain propulsion system. Common causes include Check for Hybrid Codes. 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: P15F9 2014 GMC Sierra indicates Hybrid/EV System Engine Speed Control Intervention Request Type Signal Message Counter Incorrect.
Common causes: Common causes include Check for Hybrid Codes.
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.

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Code Popularity 152

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 Sep 28, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P15F9 2014 GMC Sierra Description

The Hybrid Powertrain Control Module is constantly sending serial data messages to the Engine Control Module (ECM) regarding the operating state of the powertrain propulsion system. These messages are sent in a continuously repeating series of rolling counts with associated password protect samples. Each count/sample is assigned a value. The ECM uses the values, during a propulsion system mode shift, to determine when and at what RPM to idle the internal combustion engine. When the ECM determines that too many of the counts/samples contain an error value, the ECM sets DTC P15F9.

OBDII Code P15F9 2014 GMC Sierra - Hybrid/EV System Engine Speed Control Intervention Request Type Signal Message Counter Incorrect - AutoCodes.com — P15F9 2014 GMC Sierra Code - Hybrid/EV System Engine Speed Control Intervention Request Type Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P15F9 2014 GMC Sierra?

Check for Hybrid Codes

How to Fix the DTC P15F9 2014 GMC Sierra?

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 P15F9 2014 GMC Sierra 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 P15F9 2014 GMC Sierra code?

Need more information on how to fix the P15F9 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P15F9 2014 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 P15F9 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P15F9 in a 2014 GMC Sierra Hybrid/EV system?

- Common symptoms include reduced engine performance, poor fuel efficiency, and possible illumination of the check engine light.

2. What could cause the OBDII code P15F9 to appear in a 2014 GMC Sierra Hybrid/EV system?

- This code may be triggered by a faulty engine speed control sensor, a malfunctioning hybrid/EV system component, or wiring issues.

3. How can I diagnose the OBDII code P15F9 in my 2014 GMC Sierra Hybrid/EV system?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, checking the engine speed control system components, and inspecting related wiring for damage.

4. Can I continue driving my 2014 GMC Sierra with the OBDII code P15F9 present?

- It is not recommended to continue driving with this code active, as it can lead to further damage to the engine or hybrid/EV system components.

5. What are some possible repair tips for fixing the OBDII code P15F9 in a 2014 GMC Sierra Hybrid/EV system?

- Repair tips may include replacing the faulty engine speed control sensor, repairing any damaged wiring, or addressing issues within the hybrid/EV system components.

6. Is it necessary to take my 2014 GMC Sierra to a dealership for OBDII code P15F9 repairs?

- While a dealership may have specialized knowledge, a qualified mechanic experienced with hybrid/EV systems can also diagnose and repair the issue effectively.

7. How much can I expect to pay for repairs related to the OBDII code P15F9 in a 2014 GMC Sierra Hybrid/EV system?

- Repair costs can vary depending on the exact cause of the issue, but they may range from a few hundred to a few thousand dollars, including parts and labor.

8. Are there any preventive measures to avoid encountering the OBDII code P15F9 in a 2014 GMC Sierra Hybrid/EV system?

- Regular maintenance of the hybrid/EV system components and prompt attention to any warning signs can help prevent the occurrence of this code.

9. Can resetting the OBDII system clear the P15F9 code in a 2014 GMC Sierra Hybrid/EV system?

- While clearing the code temporarily may turn off the check engine light, the underlying issue causing the code will need to be diagnosed and repaired to prevent its return.

10. Does the OBDII code P15F9 affect the safety of driving a 2014 GMC Sierra Hybrid/EV vehicle?

- While the code itself may not directly impact safety, it is essential to address the underlying issue promptly to ensure the proper functioning of the vehicle's engine and hybrid/EV system.