AutoCodes – GMC – P16E8 2014 GMC Sierra

P16E8 2014 GMC Sierra Code - Engine Controls Ignition Relay 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 Controls Ignition Relay, Engine Controls Ignition Relay harness is open or shorted, Engine Controls Ignition Relay 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: P16E8 2014 GMC Sierra indicates Engine Controls Ignition Relay Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Engine Controls Ignition Relay, Engine Controls Ignition Relay harness is open or shorted, Engine Controls Ignition Relay 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 159

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 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16E8 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 Engine Controls Ignition Relay Signal Message Counter Incorrect.

OBDII Code P16E8 2014 GMC Sierra - Engine Controls Ignition Relay Signal Message Counter Incorrect - AutoCodes.com — P16E8 2014 GMC Sierra Code - Engine Controls Ignition Relay Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P16E8 2014 GMC Sierra?

Faulty Engine Controls Ignition Relay
Engine Controls Ignition Relay harness is open or shorted
Engine Controls Ignition Relay circuit poor electrical connection

How to Fix the DTC P16E8 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 P16E8 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 P16E8 2014 GMC Sierra code?

Need more information on how to fix the P16E8 2014 GMC Sierra code? Get Access to Factory Service Manuals

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Get the P16E8 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 P16E8 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P16E8 in a 2014 GMC Sierra?

The common symptoms include engine misfires, rough idling, poor acceleration, and potential stalling of the vehicle.

2. What does the OBDII code P16E8 "Engine Controls Ignition Relay Signal Message Counter Incorrect" mean for a 2014 GMC Sierra?

This code indicates that the engine control module (ECM) has detected an incorrect signal or count from the ignition relay circuit.

3. What are the possible causes of OBDII code P16E8 in a 2014 GMC Sierra?

Possible causes include a faulty ignition relay, wiring issues in the ignition relay circuit, a malfunctioning ECM, or software glitches within the vehicle's control modules.

4. How can I diagnose the OBDII code P16E8 in a 2014 GMC Sierra?

Diagnosis typically involves inspecting the ignition relay and its circuit for any visible damage, testing the relay's functionality, checking for loose or corroded wiring connections, and using a diagnostic scanner to gather more data.

5. Can I continue driving my 2014 GMC Sierra with the OBDII code P16E8 present?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further engine issues and potential safety hazards. It's best to address the problem promptly.

6. How can I repair OBDII code P16E8 in a 2014 GMC Sierra?

Repair options may include replacing the faulty ignition relay, repairing any damaged wiring, resetting the ECM, or updating the vehicle's software to address any glitches causing the issue.

7. Will resetting the ECM clear the OBDII code P16E8 from a 2014 GMC Sierra?

Resetting the ECM may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return. It's essential to diagnose and fix the root cause of the problem.

8. Is it safe to reset the ECM to clear the OBDII code P16E8 in a 2014 GMC Sierra?

Resetting the ECM is generally safe and a common troubleshooting step. However, ensure you have diagnosed the issue correctly and that any necessary repairs are made to prevent the code from reappearing.

9. Can a DIY enthusiast repair OBDII code P16E8 in a 2014 GMC Sierra?

While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing complex issues related to this code may require professional tools and expertise. It's recommended to seek assistance if needed.

10. How much does it typically cost to repair OBDII code P16E8 in a 2014 GMC Sierra?

The cost of repairs can vary depending on the underlying cause of the issue, the parts needed for replacement, and labor charges. It's advisable to obtain quotes from reputable mechanics or service centers for an accurate estimate.