AutoCodes – GMC – P16E8 2017 GMC Sierra

P16E8 2017 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 2017 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 179

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 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 Engine Controls Ignition Relay Signal Message Counter Incorrect.

OBDII Code P16E8 2017 GMC Sierra - Engine Controls Ignition Relay Signal Message Counter Incorrect - AutoCodes.com — P16E8 2017 GMC Sierra Code - Engine Controls Ignition Relay Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P16E8 2017 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 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 P16E8 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 P16E8 2017 GMC Sierra code?

Need more information on how to fix the P16E8 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16E8 2017 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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P16E8 in a 2017 GMC Sierra?

The common symptoms of code P16E8 include engine misfires, rough idling, poor acceleration, and the Check Engine light being illuminated.

2. What does the OBDII code P16E8 indicate in a 2017 GMC Sierra?

Code P16E8 indicates that the Engine Controls Ignition Relay Signal Message Counter is incorrect, suggesting a communication issue between the engine controls and ignition relay.

3. What are the possible causes of OBDII code P16E8 in a 2017 GMC Sierra?

Possible causes of code P16E8 include a faulty ignition relay, wiring or connection issues, a malfunctioning engine control module (ECM), or a software glitch.

4. How can I diagnose the OBDII code P16E8 in my 2017 GMC Sierra?

Diagnosing code P16E8 involves checking the ignition relay, inspecting the wiring for damage or loose connections, scanning the ECM for other related codes, and performing a communication test between the components.

5. Can I continue driving my 2017 GMC Sierra with OBDII code P16E8?

It is not recommended to continue driving your vehicle with code P16E8 present, as it can lead to potential engine performance issues and further damage if left unresolved.

6. How can I repair OBDII code P16E8 in my 2017 GMC Sierra?

Repairing code P16E8 may involve replacing the faulty ignition relay, repairing any damaged wiring, resetting the ECM, or updating the software to address communication errors.

7. Is it necessary to reset the OBDII code P16E8 after repairs in a 2017 GMC Sierra?

Yes, it is important to reset the code after making repairs to clear the fault from the system and ensure that the issue has been resolved successfully.

8. Can a DIY enthusiast fix OBDII code P16E8 in a 2017 GMC Sierra?

While some simple checks like inspecting wiring connections can be done by a DIY enthusiast, diagnosing and repairing complex issues related to code P16E8 may require professional assistance.

9. How much does it cost to repair OBDII code P16E8 in a 2017 GMC Sierra?

The cost of repairing code P16E8 can vary depending on the exact cause of the issue, the labor rates in your area, and whether any parts need to be replaced. It is best to consult a mechanic for an accurate estimate.

10. Will OBDII code P16E8 affect the overall performance of my 2017 GMC Sierra?

Yes, code P16E8 can affect the overall performance of your vehicle by causing engine misfires, rough idling, and poor acceleration if not addressed promptly.