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P16FF 2014 Chevrolet Silverado Code - Engine Controls Ignition Relay Request Signal Message Counter Incorrect

Quick Answer

The P16FF diagnostic trouble code (DTC) indicates an issue with the communication between the engine control module (ECM) and the ignition relay. Common causes include Faulty ignition relay or relay socket, Damaged or corroded wiring and connectors in the ignition system, Malfunctioning engine control module (ECM) or software issues. 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 Chevrolet Silverado indicates Engine Controls Ignition Relay Request Signal Message Counter Incorrect.
Common causes
Common causes include Faulty ignition relay or relay socket, Damaged or corroded wiring and connectors in the ignition system, Malfunctioning engine control module (ECM) or software issues.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 28, 2024
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Code P16FF 2014 Chevrolet Silverado Description

The P16FF diagnostic trouble code (DTC) indicates an issue with the communication between the engine control module (ECM) and the ignition relay. Specifically, it suggests that the message counter for the ignition relay request signal is incorrect. This code is part of the vehicle's onboard diagnostics (OBD-II) system and is triggered when the ECM detects a discrepancy in the expected communication protocol with the ignition relay.

OBDII Code P16FF 2014 Chevrolet Silverado - Engine Controls Ignition Relay Request Signal Message Counter Incorrect
P16FF 2014 Chevrolet Silverado Code - Engine Controls Ignition Relay Request Signal Message Counter Incorrect

Common Causes of P16FF 2014 Chevrolet Silverado

  1. Faulty ignition relay or relay socket.
  2. Damaged or corroded wiring and connectors in the ignition system.
  3. Malfunctioning engine control module (ECM) or software issues.
  4. Poor ground connections affecting the relay operation.
  5. Issues with related control modules, such as the body control module (BCM).

Symptoms of P16FF 2014 Chevrolet Silverado

  1. Engine cranks but does not start.
  2. Intermittent stalling while driving.
  3. Dashboard warning lights illuminated, particularly the check engine light.
  4. Difficulty in starting the engine, requiring multiple attempts.
  5. Reduced engine performance or misfires.

How to Fix P16FF 2014 Chevrolet Silverado

  1. Diagnostic Scan: Begin by using an OBD-II scanner to confirm the P16FF code and check for any additional codes that may provide more context.
  2. Visual Inspection: Inspect the ignition relay, wiring, and connectors for any signs of damage, corrosion, or loose connections.
  3. Relay Testing: Test the ignition relay using a multimeter to ensure it operates correctly. If faulty, replace it with a new relay.
  4. Wiring Repair: If damaged wiring or poor connections are found, repair or replace the affected components to restore proper communication.
  5. ECM Update: If the ECM is suspected to be malfunctioning or outdated, consider reprogramming or updating the software to the latest version.

Cost to Fix P16FF 2014 Chevrolet Silverado

Repair costs for addressing the P16FF code can vary widely based on the specific issue identified during diagnosis. On average, you can expect to pay between $100 and $400 for repairs. This estimate includes parts such as a new ignition relay (typically costing $20-$100) and labor costs, which can range from $80 to $150 per hour. Factors such as location, the specific make and model of the vehicle, and the engine type will influence the final cost. In metropolitan areas or at dealerships, labor rates may be higher, while independent shops often offer more competitive pricing. It is advisable to consult local repair shops for a more precise estimate tailored to your vehicle's needs.

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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 P16FF 2014 Chevrolet Silverado Code

1. What does the OBDII code P16FF mean for a 2014 Chevrolet Silverado?

P16FF indicates an issue with the Engine Controls Ignition Relay Request Signal Message Counter, meaning there is a communication error between the engine control module (ECM) and the ignition relay.

2. What are the common symptoms of code P16FF in a 2014 Chevrolet Silverado?

Symptoms may include difficulty starting the engine, intermittent stalling, reduced engine performance, or the illumination of the check engine light.

3. What causes the P16FF code to appear?

Common causes include a faulty ignition relay, wiring issues, poor connections in the ignition circuit, or a malfunctioning engine control module (ECM).

4. Can the P16FF code cause long-term damage to my 2014 Chevrolet Silverado?

If unresolved, this code could lead to unreliable engine performance or prevent the vehicle from starting altogether, but it typically does not cause direct damage to engine components.

5. How can I fix the P16FF code on my Chevrolet Silverado?

Start by inspecting the ignition relay and its wiring for damage or corrosion. Replace the ignition relay if necessary, and check the ECM for faults.

6. Is the P16FF code related to battery issues?

While not directly related to the battery, low voltage or poor battery connections can cause communication errors that trigger this code.

7. Can I drive my 2014 Chevrolet Silverado with the P16FF code?

It’s possible to drive with this code, but it’s not recommended as the engine may stall unexpectedly or fail to start, which could leave you stranded.

8. How much does it cost to repair the P16FF code?

Repair costs vary depending on the issue but typically range from $100 to $500 for parts and labor if the ignition relay or wiring needs replacement.

9. Does clearing the P16FF code fix the problem?

Clearing the code will remove the check engine light temporarily, but unless the underlying issue is resolved, the code will likely return.

10. Should I consult a mechanic for the P16FF code?

If basic troubleshooting doesn’t resolve the issue, it’s best to consult a qualified mechanic to diagnose and repair the problem accurately.

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