AutoCodes – Chevrolet – P15F9 2015 Chevrolet Silverado

P15F9 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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 233

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado - Hybrid/EV System Engine Speed Control Intervention Request Type Signal Message Counter Incorrect - AutoCodes.com — P15F9 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado?

Check for Hybrid Codes

How to Fix the DTC P15F9 2015 Chevrolet Silverado?

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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado code?

Need more information on how to fix the P15F9 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P15F9 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado Code

What does the OBDII code P15F9 mean for a 2015 Chevrolet Silverado?

The P15F9 code indicates that the hybrid/electric vehicle system has detected an issue with the engine speed control intervention request, specifically that the signal message counter is incorrect.

What symptoms might I experience if my Silverado has the P15F9 code?

Common symptoms include reduced engine power, erratic acceleration, warning lights on the dashboard, and issues with the hybrid system engaging or disengaging.

What could cause the P15F9 code to trigger in my Silverado?

Potential causes include a malfunctioning hybrid control module, wiring issues, faulty sensors, or communication problems between the engine control module and the hybrid system.

Is it safe to drive my Chevrolet Silverado with the P15F9 code?

While it may be drivable, it is not recommended to operate the vehicle with this code active, as it may lead to reduced performance and could result in further damage to the hybrid system.

How can I diagnose the P15F9 code effectively?

Start by using an OBDII scanner to confirm the code, then inspect wiring and connections related to the hybrid system. Check for any other codes that may provide additional context.

What repairs can I expect to address the P15F9 code?

Repair options may include replacing faulty sensors, repairing damaged wiring, updating or reprogramming the hybrid control module, or addressing any communication issues between modules.

Should I clear the P15F9 code after repairs?

Yes, after performing the necessary repairs, clear the code with an OBDII scanner and take the vehicle for a test drive to see if the code returns.

Can the P15F9 code affect fuel efficiency in my Silverado?

Yes, since the code relates to the hybrid system's performance, it can lead to inefficient fuel usage and reduced overall fuel economy.

Are there any DIY solutions for the P15F9 code before visiting a mechanic?

Check for loose or damaged wiring and connectors related to the hybrid system, and ensure that all related components are properly seated and functioning. However, complex issues may require professional diagnostics.