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Engine-Codes – GMC – P14D4 2018 GMC Sierra

P14D4 2018 GMC Sierra Code - Fuel Pump Driver Control Module Configuration Command Signal 2 Message Counter Incorrect

Quick Answer

The P14D4 diagnostic trouble code (DTC) indicates that the Fuel Pump Driver Control Module (FPDCM) is receiving an incorrect message count for the configuration command signal 2. Common causes include Faulty Fuel Pump Driver Control Module (FPDCM), Damaged or corroded wiring/connectors between the FPDCM and ECM, Software issues or programming errors within the ECM. 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
P14D4 2018 GMC Sierra indicates Fuel Pump Driver Control Module Configuration Command Signal 2 Message Counter Incorrect.
Common causes
Common causes include Faulty Fuel Pump Driver Control Module (FPDCM), Damaged or corroded wiring/connectors between the FPDCM and ECM, Software issues or programming errors within the ECM.
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 17, 2024
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Code P14D4 2018 GMC Sierra Description

The P14D4 diagnostic trouble code (DTC) indicates that the Fuel Pump Driver Control Module (FPDCM) is receiving an incorrect message count for the configuration command signal 2. This signal is crucial for the proper operation of the fuel pump, as it ensures that the fuel pump receives the correct commands from the engine control module (ECM). When this code is triggered, it suggests a communication issue between the FPDCM and the ECM, which can lead to various performance problems.

OBDII Code P14D4 2018 GMC Sierra - Fuel Pump Driver Control Module Configuration Command Signal 2 Message Counter Incorrect
P14D4 2018 GMC Sierra Code - Fuel Pump Driver Control Module Configuration Command Signal 2 Message Counter Incorrect

Common Causes of P14D4 2018 GMC Sierra

  1. Faulty Fuel Pump Driver Control Module (FPDCM).
  2. Damaged or corroded wiring/connectors between the FPDCM and ECM.
  3. Software issues or programming errors within the ECM.
  4. Faulty fuel pump that is not responding to commands from the FPDCM.
  5. Electrical interference or short circuits affecting communication signals.

Symptoms of P14D4 2018 GMC Sierra

  1. Difficulty starting the engine or extended cranking times.
  2. Engine stalling or hesitation during acceleration.
  3. Poor fuel economy due to improper fuel delivery.
  4. Illuminated check engine light on the dashboard.
  5. Erratic fuel gauge readings or fluctuations in fuel pressure.

How to Fix P14D4 2018 GMC Sierra

  1. Diagnostic Scan: Begin by using an OBD-II scanner to confirm the P14D4 code and check for any additional codes that may provide further insight into the issue.
  2. Visual Inspection: Inspect the wiring and connectors between the FPDCM and ECM for signs of damage, corrosion, or loose connections. Repair or replace any damaged components as necessary.
  3. Module Testing: Test the FPDCM and ECM to ensure they are functioning correctly. This may involve using specialized diagnostic equipment to check for proper signal transmission and response.
  4. Software Update: If the ECM is found to have outdated software, perform a software update to ensure compatibility with the FPDCM.
  5. Replace Components: If the FPDCM or fuel pump is determined to be faulty, replace the affected component and clear the diagnostic codes before retesting the system.

Cost to Fix P14D4 2018 GMC Sierra

The typical repair costs for addressing a P14D4 code can vary widely based on the specific diagnosis and repairs needed. For instance, if the issue is simply a wiring problem, costs may range from $100 to $300. However, if the FPDCM or fuel pump needs replacement, costs can escalate to $500 to $1,200, including parts and labor. The specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops commonly charge between $80 and $150 per hour; however, rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate.

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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 P14D4 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P14D4 in a 2018 GMC Sierra?

The common symptoms of OBDII code P14D4 in a 2018 GMC Sierra include issues with the fuel pump operation, engine performance problems, and illuminated check engine light.

2. What does the OBDII code P14D4 indicate in a 2018 GMC Sierra?

The OBDII code P14D4 in a 2018 GMC Sierra indicates that the Fuel Pump Driver Control Module Configuration Command Signal 2 Message Counter is incorrect.

3. What are the possible causes of OBDII code P14D4 in a 2018 GMC Sierra?

The possible causes of OBDII code P14D4 in a 2018 GMC Sierra include a faulty fuel pump driver control module, wiring issues, or a software malfunction.

4. How can I diagnose OBDII code P14D4 in my 2018 GMC Sierra?

Diagnosing OBDII code P14D4 in a 2018 GMC Sierra requires using an OBDII scanner to retrieve the specific fault code and then inspecting the fuel pump driver control module and related wiring for any issues.

5. Can I still drive my 2018 GMC Sierra with OBDII code P14D4?

It is not recommended to drive your 2018 GMC Sierra with OBDII code P14D4, as it can lead to potential fuel pump failures and engine performance issues.

6. How can I repair OBDII code P14D4 in my 2018 GMC Sierra?

To repair OBDII code P14D4 in a 2018 GMC Sierra, you may need to replace the fuel pump driver control module, repair any damaged wiring, or update the software as per manufacturer recommendations.

7. Is it safe to reset the OBDII code P14D4 in my 2018 GMC Sierra using a scanner?

While resetting the OBDII code P14D4 in your 2018 GMC Sierra using a scanner may clear the fault code, it is important to address the underlying issue causing the code to prevent further problems.

8. Can a DIY enthusiast fix OBDII code P14D4 in a 2018 GMC Sierra?

A DIY enthusiast with the necessary tools and knowledge may be able to fix OBDII code P14D4 in a 2018 GMC Sierra by following proper diagnostic procedures and repair instructions.

9. How much does it cost to repair OBDII code P14D4 in a 2018 GMC Sierra at a professional repair shop?

The cost to repair OBDII code P14D4 in a 2018 GMC Sierra at a professional repair shop can vary depending on the extent of the issue, parts needed, and labor rates, but it typically ranges from $200 to $500.

10. Can OBDII code P14D4 in a 2018 GMC Sierra cause long-term damage if left untreated?

If left untreated, OBDII code P14D4 in a 2018 GMC Sierra can potentially lead to fuel pump failure, engine performance issues, and other problems that may result in costly repairs down the line.

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