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Engine-Codes – GMC – P14D5 GMC

P14D5 GMC Code - Fuel Pump Driver Control Module Configuration Command Signal 3 Message Counter Incorrect

Quick Answer

The P14D5 code indicates a malfunction related to the Fuel Pump Driver Control Module (FPDCM) in GMC vehicles. Common causes include Faulty Fuel Pump Driver Control Module: A malfunctioning FPDCM can lead to incorrect signal processing, Wiring Issues: Damaged or corroded wiring and connectors can disrupt communication between the ECM and FPDCM, Software Glitches: Outdated or corrupted software in the ECM or FPDCM can cause miscommunication. 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
P14D5 GMC indicates Fuel Pump Driver Control Module Configuration Command Signal 3 Message Counter Incorrect.
Common causes
Common causes include Faulty Fuel Pump Driver Control Module: A malfunctioning FPDCM can lead to incorrect signal processing, Wiring Issues: Damaged or corroded wiring and connectors can disrupt communication between the ECM and FPDCM, Software Glitches: Outdated or corrupted software in the ECM or FPDCM can cause miscommunication.
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 16, 2024
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Code P14D5 GMC Description

The P14D5 code indicates a malfunction related to the Fuel Pump Driver Control Module (FPDCM) in GMC vehicles. This code specifically points to an issue with the Configuration Command Signal 3 message counter, which is part of the communication protocol between the Engine Control Module (ECM) and the FPDCM. The FPDCM is responsible for regulating the fuel pump's operation, ensuring that the engine receives the appropriate amount of fuel under varying conditions.

OBDII Code P14D5 GMC - Fuel Pump Driver Control Module Configuration Command Signal 3 Message Counter Incorrect
P14D5 GMC Code - Fuel Pump Driver Control Module Configuration Command Signal 3 Message Counter Incorrect

Common Causes of P14D5 GMC

  1. Faulty Fuel Pump Driver Control Module: A malfunctioning FPDCM can lead to incorrect signal processing.
  2. Wiring Issues: Damaged or corroded wiring and connectors can disrupt communication between the ECM and FPDCM.
  3. Software Glitches: Outdated or corrupted software in the ECM or FPDCM can cause miscommunication.
  4. Electrical Interference: Electromagnetic interference from other components can affect the signal integrity.
  5. Fuel Pump Failure: A failing fuel pump may not respond correctly to commands from the FPDCM.

Symptoms of P14D5 GMC

  1. Poor Engine Performance: The vehicle may experience hesitation, misfires, or a lack of power during acceleration.
  2. Stalling: The engine may stall unexpectedly, particularly during idling or low-speed driving.
  3. Difficulty Starting: The vehicle may have trouble starting, requiring multiple attempts to engage the engine.
  4. Check Engine Light: The illumination of the check engine light on the dashboard, indicating a fault in the fuel delivery system.
  5. Increased Fuel Consumption: The vehicle may exhibit decreased fuel efficiency due to improper fuel delivery.

How to Fix P14D5 GMC

  1. Diagnostic Scan: Start with a comprehensive diagnostic scan to confirm the P14D5 code and check for any related codes.
  2. Inspect Wiring and Connectors: Examine the wiring harness and connectors for signs of damage, corrosion, or loose connections, and repair or replace as necessary.
  3. Update Software: If applicable, update the ECM and FPDCM software to the latest version to resolve any potential glitches.
  4. Test FPDCM Functionality: Use a multimeter to test the FPDCM for proper operation and replace it if it is found to be faulty.
  5. Replace Fuel Pump (if necessary): If the fuel pump is determined to be the root cause, replace it to ensure proper fuel delivery.

Cost to Fix P14D5 GMC

The cost to diagnose and repair the P14D5 code can vary significantly based on several factors, including the specific vehicle make and model, the location of the repair shop, and the complexity of the repair. Typically, the diagnostic fee may range from $80 to $150 per hour, with the total repair costs potentially falling between $200 to $1,000. This estimate includes parts such as the FPDCM or fuel pump, which can vary in price. In metropolitan areas or at dealerships, labor rates may be higher, while independent shops may offer more competitive pricing. It's advisable to check local rates and obtain multiple quotes for a more precise estimate.

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Information for Specific GMC Models

  • P14D5 2014 GMC Sierra — Fuel Pump Driver Control Module Configuration Command Signal 3 Message Counter Incorrect
  • P14D5 2015 GMC Sierra — Fuel Pump Driver Control Module Configuration Command Signal 3 Message Counter Incorrect
  • P14D5 2016 GMC Sierra — Fuel Pump Driver Control Module Configuration Command Signal 3 Message Counter Incorrect
  • P14D5 2017 GMC Sierra — Fuel Pump Driver Control Module Configuration Command Signal 3 Message Counter Incorrect
  • P14D5 2018 GMC Sierra — Fuel Pump Driver Control Module Configuration Command Signal 3 Message Counter Incorrect
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 P14D5 GMC Code

1. What are the common symptoms of OBDII code P14D5 GMC?

- Common symptoms include rough idling, engine stalling, decreased fuel efficiency, and illuminated Check Engine Light.

2. What does the OBDII code P14D5 GMC indicate?

- The code indicates that the Fuel Pump Driver Control Module Configuration Command Signal 3 Message Counter Incorrect.

3. What are the possible causes of OBDII code P14D5 GMC?

- Possible causes include a faulty fuel pump driver control module, wiring issues, a malfunctioning fuel pump, or software glitches.

4. How can I diagnose OBDII code P14D5 GMC?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking the fuel pump driver control module, inspecting wiring connections, and testing the fuel pump.

5. Can I still drive my vehicle with OBDII code P14D5 GMC?

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

6. How can I repair OBDII code P14D5 GMC?

- Repair options may include replacing the fuel pump driver control module, repairing or replacing damaged wiring, checking and replacing the fuel pump if necessary, and clearing the code with a diagnostic tool.

7. Is it safe to ignore OBDII code P14D5 GMC?

- Ignoring the code can lead to further damage to the fuel system and potentially cause engine performance issues, so it is best to address the problem promptly.

8. Can a DIY enthusiast fix OBDII code P14D5 GMC?

- Depending on the root cause of the code, some DIY enthusiasts may be able to address the issue by following repair guides and using the necessary tools.

9. How common is OBDII code P14D5 GMC in GMC vehicles?

- The code can occur in various GMC models, particularly those equipped with a fuel pump driver control module and electronic fuel injection system.

10. How long does it typically take to resolve OBDII code P14D5 GMC?

- The time taken to resolve the code can vary depending on the exact cause and repair process involved, but it is advisable to address it as soon as possible to prevent further complications.

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