AutoCodes – GMC – P15E2 GMC

P15E2 GMC 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 GMC 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 313

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

What does this mean?

What are the Possible Causes of the DTC P15E2 GMC?

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 GMC?

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 GMC 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 GMC code?

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

Need Help with the Code?

Get the P15E2 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P15E2 2014 GMC Sierra — Alternative Fuel System Request Signal Message Counter Incorrect
P15E2 2015 GMC Sierra — Alternative Fuel System Request Signal Message Counter Incorrect
P15E2 2016 GMC Sierra — Alternative Fuel System Request Signal Message Counter Incorrect
P15E2 2017 GMC Sierra — Alternative Fuel System Request Signal Message Counter Incorrect
P15E2 2018 GMC Sierra — Alternative Fuel System Request Signal Message Counter Incorrect

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 GMC Code

1. What are the common symptoms of OBDII code P15E2 GMC?

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

2. What does OBDII code P15E2 GMC mean?

- This code indicates that the vehicle's alternative fuel system request signal message counter is incorrect.

3. What are the possible causes of OBDII code P15E2 GMC?

- Possible causes include a faulty alternative fuel control module, wiring issues, software glitches, or sensor malfunctions.

4. How can I diagnose OBDII code P15E2 GMC?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the code, checking the alternative fuel system components, and inspecting related wiring.

5. Can I still drive my vehicle with OBDII code P15E2 GMC?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potential safety issues.

6. How can I repair OBDII code P15E2 GMC?

- Repairing this code may involve replacing the faulty alternative fuel control module, repairing wiring issues, updating software, or replacing malfunctioning sensors.

7. Is it safe to reset the OBDII code P15E2 GMC and clear the check engine light?

- It is safe to clear the code temporarily, but it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

8. Can a DIYer fix OBDII code P15E2 GMC at home?

- Depending on the specific cause, some DIYers may be able to address this code at home with the proper tools and knowledge, while others may require professional assistance.

9. How much does it cost to repair OBDII code P15E2 GMC?

- The cost of repairing this code can vary widely depending on the root cause, the extent of the repairs needed, and whether it is done at a dealership or an independent mechanic.

10. How can I prevent OBDII code P15E2 GMC from coming back?

- Regular maintenance, such as checking the alternative fuel system components, keeping up with software updates, and addressing any issues promptly, can help prevent this code from reoccurring.