AutoCodes – GMC – P15E2 2014 GMC Sierra

P15E2 2014 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 2014 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 135

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 2014 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 2014 GMC Sierra - Alternative Fuel System Request Signal Message Counter Incorrect - AutoCodes.com — P15E2 2014 GMC Sierra Code - Alternative Fuel System Request Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P15E2 2014 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 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 P15E2 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 P15E2 2014 GMC Sierra code?

Need more information on how to fix the P15E2 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P15E2 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 P15E2 2014 GMC Sierra Code

1. What does the OBDII code P15E2 mean for a 2014 GMC Sierra?

P15E2 indicates that the Alternative Fuel System Request Signal Message Counter is incorrect, suggesting a communication issue between the alternative fuel system and the vehicle's control modules.

2. What are the common symptoms of the P15E2 code?

Symptoms may include the check engine light turning on, reduced engine performance, or issues with the alternative fuel system functionality.

3. What causes the P15E2 code to trigger?

This code can be caused by faulty wiring, a defective alternative fuel system control module, a software glitch, or communication errors between the modules.

4. Can a loose or damaged connector cause the P15E2 code?

Yes, a loose or damaged connector in the alternative fuel system wiring can disrupt communication and trigger the code.

5. Is the P15E2 code specific to vehicles with alternative fuel systems?

Yes, this code is specific to vehicles equipped with an alternative fuel system, as it relates to the system's communication with the vehicle's modules.

6. How is the P15E2 code diagnosed?

A technician will inspect the wiring and connectors, check the control module for faults, and use a scan tool to monitor the communication signals between modules.

7. Can the P15E2 code be fixed without replacing parts?

Sometimes, the issue can be resolved by repairing damaged wiring, cleaning connectors, or reprogramming the control module if a software update is available.

8. Will driving with the P15E2 code cause further damage?

While it may not cause immediate damage, ignoring the code could lead to performance issues or prevent the alternative fuel system from functioning correctly.

9. How much does it typically cost to repair the P15E2 code?

Repair costs vary depending on the cause. Simple wiring repairs may cost $100-$200, while control module replacement or reprogramming could cost $500 or more.

10. Can I reset the P15E2 code myself?

You can clear the code with an OBDII scanner, but if the underlying issue isnâ€™t resolved, the code will likely return. Proper diagnosis and repair are recommended.