AutoCodes – GMC – P15E2 2017 GMC Sierra

P15E2 2017 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 2017 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 185

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 2017 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 2017 GMC Sierra - Alternative Fuel System Request Signal Message Counter Incorrect - AutoCodes.com — P15E2 2017 GMC Sierra Code - Alternative Fuel System Request Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P15E2 2017 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 2017 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 2017 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 2017 GMC Sierra code?

Need more information on how to fix the P15E2 2017 GMC Sierra code? Get Access to Factory Service Manuals

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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 2017 GMC Sierra Code

1. What does the OBDII code P15E2 mean on a 2017 GMC Sierra?

P15E2 indicates an issue with the Alternative Fuel System Request Signal Message Counter being incorrect, suggesting a communication problem between the alternative fuel system and the vehicle's control module.

2. What are the common symptoms of code P15E2 in a 2017 GMC Sierra?

Symptoms may include the check engine light turning on, reduced engine performance, or irregularities in the alternative fuel system operation.

3. What causes the P15E2 code to appear on a 2017 GMC Sierra?

Common causes include a faulty fuel control module, wiring or connection issues in the alternative fuel system, or a software glitch in the vehicle's control module.

4. Can a bad alternative fuel system sensor trigger code P15E2?

Yes, a malfunctioning sensor within the alternative fuel system can cause incorrect signal messages, leading to the P15E2 code.

5. How is the P15E2 code diagnosed on a 2017 GMC Sierra?

Diagnosis typically involves using an OBDII scanner to confirm the code, inspecting the wiring and connections in the alternative fuel system, and testing the fuel control module for proper function.

6. Can I drive my 2017 GMC Sierra with a P15E2 code?

While the vehicle may still be drivable, it's not recommended as it could lead to further issues with the alternative fuel system or reduced performance.

7. What repairs can fix the P15E2 code on a 2017 GMC Sierra?

Repairs may include replacing a faulty fuel control module, repairing or replacing damaged wiring, or updating the vehicle's software if a glitch is found.

8. Does the P15E2 code only apply to vehicles with alternative fuel systems?

Yes, the code specifically relates to vehicles equipped with alternative fuel systems, such as those running on compressed natural gas (CNG) or similar.

9. How much does it cost to fix the P15E2 code on a 2017 GMC Sierra?

Repair costs can vary widely depending on the root cause, ranging from $100 for minor wiring repairs to over $500 for module replacement or reprogramming.

10. Can a software update resolve the P15E2 code on a 2017 GMC Sierra?

In some cases, a software update for the vehicle's control module may resolve the issue if it stems from a programming error.