AutoCodes – GMC – P16FF 2014 GMC Sierra

P16FF 2014 GMC Sierra Code - Engine Controls Ignition Relay 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 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: P16FF 2014 GMC Sierra indicates Engine Controls Ignition Relay Request 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 149

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P16FF 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 Request Signal Message Counter Incorrect.

OBDII Code P16FF 2014 GMC Sierra - Engine Controls Ignition Relay Request Signal Message Counter Incorrect - AutoCodes.com — P16FF 2014 GMC Sierra Code - Engine Controls Ignition Relay Request Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P16FF 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 P16FF 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 P16FF 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 P16FF 2014 GMC Sierra code?

Need more information on how to fix the P16FF 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16FF 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 P16FF 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P16FF on a 2014 GMC Sierra?

The common symptoms of code P16FF may include engine misfires, rough idling, reduced engine performance, and in some cases, the vehicle may fail to start.

2. What does the OBDII code P16FF indicate on a 2014 GMC Sierra?

Code P16FF indicates that the Engine Controls Ignition Relay Request Signal Message Counter is reporting incorrect data, suggesting a potential issue with the ignition relay system.

3. What are the possible causes of OBDII code P16FF on a 2014 GMC Sierra?

Possible causes of code P16FF include a faulty ignition relay, damaged wiring or connectors in the ignition relay circuit, a malfunctioning Engine Control Module (ECM), or software issues.

4. How can I diagnose the OBDII code P16FF on my 2014 GMC Sierra?

Diagnosing code P16FF may involve checking the ignition relay for proper operation, inspecting the wiring and connectors for damage, and using a diagnostic scanner to retrieve specific information related to the code.

5. Can I still drive my 2014 GMC Sierra with OBDII code P16FF active?

It is not recommended to drive your vehicle with an active OBDII code P16FF, as it can lead to further damage to the engine or ignition system. It's best to address the issue promptly.

6. How can I repair OBDII code P16FF on my 2014 GMC Sierra?

Repairing code P16FF may involve replacing the faulty ignition relay, repairing damaged wiring or connectors, resetting the ECM, or updating the software to correct the message counter discrepancy.

7. Will resetting the OBDII code P16FF on my 2014 GMC Sierra make it go away permanently?

Resetting the code may temporarily clear it, but if the underlying issue causing code P16FF is not addressed, the code is likely to return. It's important to diagnose and repair the root cause.

8. Is it safe to ignore OBDII code P16FF on my 2014 GMC Sierra?

Ignoring OBDII code P16FF can lead to potential engine performance issues, increased fuel consumption, and further damage to components. It's best to address the code promptly to prevent more significant problems.

9. Can a DIY enthusiast fix OBDII code P16FF on a 2014 GMC Sierra?

Depending on the DIY enthusiast's skill level and access to tools, it may be possible to address code P16FF by replacing the ignition relay or checking the wiring. However, more complex diagnostics may require professional help.

10. How much does it cost to repair OBDII code P16FF on a 2014 GMC Sierra?

The cost of repairing code P16FF can vary depending on the underlying cause, parts needed for replacement, and labor charges. It's advisable to consult a mechanic for an accurate estimate based on your specific situation.