AutoCodes – GMC – P15E2 2015 GMC Sierra

P15E2 2015 GMC Sierra Code - Alternative Fuel System Request Signal Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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: P15E2 2015 GMC Sierra indicates Alternative Fuel System Request Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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.

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Code Popularity 137

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 P15E2 2015 GMC Sierra Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Alternative Fuel System Request Signal Message Counter is Incorrect.

OBDII Code P15E2 2015 GMC Sierra - Alternative Fuel System Request Signal Message Counter Incorrect - AutoCodes.com — P15E2 2015 GMC Sierra Code - Alternative Fuel System Request Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P15E2 2015 GMC Sierra?

Faulty Engine Control Module (ECM)
Engine Control Module harness is open or shorted
Engine Control Module circuit poor electrical connection

How to Fix the DTC P15E2 2015 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 P15E2 2015 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 P15E2 2015 GMC Sierra code?

Need more information on how to fix the P15E2 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P15E2 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 P15E2 2015 GMC Sierra Code

What are the common symptoms of OBDII code P15E2 in a 2015 GMC Sierra?

Symptoms may include poor engine performance, decreased fuel efficiency, rough idling, and illuminated Check Engine Light.

What are the possible causes of the OBDII code P15E2 in a 2015 GMC Sierra?

Potential causes include a faulty alternative fuel system sensor, wiring issues, software glitches, or a malfunctioning engine control module.

How can I diagnose the OBDII code P15E2 in my 2015 GMC Sierra?

Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the alternative fuel system components, checking for wiring faults, and verifying sensor readings.

Can I continue driving my 2015 GMC Sierra with the P15E2 code present?

It is not recommended to drive with the P15E2 code active, as it can lead to further engine damage and potential safety hazards. It is best to address the issue promptly.

How can I repair the OBDII code P15E2 in my 2015 GMC Sierra?

Repair options may include replacing the faulty alternative fuel system sensor, repairing any damaged wiring, updating the engine control module software, and clearing the trouble codes.

Is the OBDII code P15E2 in a 2015 GMC Sierra a serious issue?

While the severity of the issue can vary, it is important to address the P15E2 code promptly to prevent potential damage to the engine and ensure optimal vehicle performance.

Can a DIY enthusiast fix the OBDII code P15E2 in a 2015 GMC Sierra?

DIY enthusiasts with the necessary tools and knowledge may be able to address the P15E2 code by following repair guides or consulting with professionals for guidance.

What should I do if the OBDII code P15E2 keeps coming back in my 2015 GMC Sierra?

If the P15E2 code keeps returning after repairs, further diagnosis may be necessary to identify any underlying issues that were not initially addressed.

Are there any recalls or technical service bulletins related to the OBDII code P15E2 in a 2015 GMC Sierra?

It is recommended to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins related to the P15E2 code in your specific vehicle.