AutoCodes – GMC – P16E8 2016 GMC Sierra

P16E8 2016 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 2016 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 384

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 2016 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 2016 GMC Sierra - Engine Controls Ignition Relay Signal Message Counter Incorrect - AutoCodes.com — P16E8 2016 GMC Sierra Code - Engine Controls Ignition Relay Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P16E8 2016 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 2016 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 2016 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 2016 GMC Sierra code?

Need more information on how to fix the P16E8 2016 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 P16E8 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P16E8 in a 2016 GMC Sierra?

- Common symptoms include rough idling, engine misfires, poor acceleration, and the check engine light being illuminated.

2. What does the OBDII code P16E8 "Engine Controls Ignition Relay Signal Message Counter Incorrect" mean in a 2016 GMC Sierra?

- This code indicates that the engine control module has detected an incorrect message counter from the ignition relay signal.

3. What are the possible causes of OBDII code P16E8 in a 2016 GMC Sierra?

- Possible causes include a faulty ignition relay, wiring issues, a malfunctioning engine control module, or software glitches.

4. How can I diagnose the OBDII code P16E8 in my 2016 GMC Sierra?

- Diagnosing this code typically involves checking the ignition relay, inspecting the wiring for any damage, and performing a thorough scan of the engine control module.

5. Can I drive my 2016 GMC Sierra with the OBDII code P16E8 present?

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

6. How can I repair OBDII code P16E8 in my 2016 GMC Sierra?

- Repairing this code may involve replacing the faulty ignition relay, repairing any damaged wiring, resetting the engine control module, or updating the software.

7. Is it possible to reset the OBDII code P16E8 in a 2016 GMC Sierra without repairs?

- While clearing the code may temporarily turn off the check engine light, it is important to address the underlying issue to prevent further problems.

8. How much does it cost to fix OBDII code P16E8 in a 2016 GMC Sierra?

- The cost of fixing this code can vary depending on the exact cause of the issue, but it may range from a few hundred to a thousand dollars.

9. Can a DIY enthusiast repair OBDII code P16E8 in a 2016 GMC Sierra?

- Depending on the skill level and tools available, some DIY enthusiasts may be able to diagnose and repair this code, particularly if it involves simple tasks like replacing the ignition relay.

10. How long does it take to repair OBDII code P16E8 in a 2016 GMC Sierra?

- The repair time can vary based on the cause of the issue and the availability of parts, but it may take a few hours to a day to fully address the problem.