AutoCodes – GMC – P1002 2014 GMC Sierra

P1002 2014 GMC Sierra Code - Fuel Pump Driver Control Module System Voltage Performance

Quick Answer

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver Control Module 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: P1002 2014 GMC Sierra indicates Fuel Pump Driver Control Module System Voltage Performance.
Common causes: Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver Control Module 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 164

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 Jul 04, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1002 2014 GMC Sierra Description

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. The Diagnostic Trouble Code (DTC) will be set when the Fuel Pump Driver Control Module detects a system voltage below or above a threshold.

OBDII Code P1002 2014 GMC Sierra - Fuel Pump Driver Control Module System Voltage Performance - AutoCodes.com — P1002 2014 GMC Sierra Code - Fuel Pump Driver Control Module System Voltage Performance

What does this mean?

What are the Possible Causes of the DTC P1002 2014 GMC Sierra?

Faulty Fuel Pump Driver Control Module
Fuel Pump Driver Control Module harness is open or shorted
Fuel Pump Driver Control Module circuit poor electrical connection

How to Fix the DTC P1002 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 P1002 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 P1002 2014 GMC Sierra code?

Need more information on how to fix the P1002 2014 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 P1002 2014 GMC Sierra Code

1. What does the OBDII code P1002 mean on a 2014 GMC Sierra?

P1002 indicates a problem with the Fuel Pump Driver Control Module (FPCM) system voltage performance, suggesting an issue with the module's operation or the electrical circuit.

2. What are the common symptoms of P1002 on a 2014 GMC Sierra?

Symptoms may include difficulty starting the engine, reduced fuel efficiency, stalling, or the engine running rough.

3. What causes the P1002 code to be triggered?

Common causes include a faulty Fuel Pump Driver Control Module, wiring or connector issues, a failing fuel pump, or a weak battery causing voltage fluctuations.

4. Can a weak battery cause the P1002 code?

Yes, a weak or failing battery can cause voltage irregularities that may trigger the P1002 code.

5. How do I diagnose the P1002 code on my 2014 GMC Sierra?

Start by inspecting the wiring and connectors to the FPCM for damage or corrosion, test the battery and charging system, and use a scan tool to monitor fuel system voltage.

6. Is it safe to drive with the P1002 code?

Driving may be possible but not recommended, as the issue could lead to poor engine performance or stalling, potentially causing unsafe driving conditions.

7. How do I fix the P1002 code on a 2014 GMC Sierra?

Repairs may include replacing the Fuel Pump Driver Control Module, repairing damaged wiring, cleaning corroded connectors, or addressing battery and alternator issues.

8. Does the fuel pump itself need to be replaced for a P1002 code?

Not necessarily. The issue may be with the control module or wiring rather than the fuel pump itself, but testing the fuel pump is part of the diagnostic process.

9. How much does it cost to repair the P1002 code?

Repair costs vary depending on the specific issue. Replacing the Fuel Pump Driver Control Module could cost $200â€“$500, while wiring repairs or battery replacement may be less.

10. Can a software update fix the P1002 code on a 2014 GMC Sierra?

In some cases, a software update from the manufacturer may address module communication or voltage performance issues, but this depends on the specific circumstances.