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Engine-Codes – GMC – P1002 2016 GMC Sierra

P1002 2016 GMC Sierra Code - Fuel Pump Driver Control Module System Voltage Performance

Quick Answer

The P1002 diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Fuel Pump Driver Control Module System Voltage Performance. Common causes include Faulty fuel pump driver control module, Electrical issues such as wiring harness damage or loose connections, Corrosion or oxidation on electrical connectors. 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 2016 GMC Sierra indicates Fuel Pump Driver Control Module System Voltage Performance.
Common causes
Common causes include Faulty fuel pump driver control module, Electrical issues such as wiring harness damage or loose connections, Corrosion or oxidation on electrical connectors.
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 Sep 09, 2024
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Code P1002 2016 GMC Sierra Description

The P1002 diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Fuel Pump Driver Control Module System Voltage Performance. This code indicates that the control module responsible for managing the fuel pump is not operating within the expected voltage range, which can lead to various performance issues in the vehicle. The fuel pump driver control module is a crucial component that regulates the fuel pump's operation, ensuring the proper fuel delivery to the engine for optimal performance. When this system voltage performance is compromised, it can negatively impact the vehicle's fuel delivery system, leading to potential stalling, hesitation, or lack of power during acceleration.

OBDII Code P1002 2016 GMC Sierra - Fuel Pump Driver Control Module System Voltage Performance
P1002 2016 GMC Sierra Code - Fuel Pump Driver Control Module System Voltage Performance

Common Causes of P1002 2016 GMC Sierra

  1. Faulty fuel pump driver control module.
  2. Electrical issues such as wiring harness damage or loose connections.
  3. Corrosion or oxidation on electrical connectors.
  4. Voltage irregularities in the fuel pump control circuit.
  5. Issues with the fuel pump relay or fuse.

Symptoms of P1002 2016 GMC Sierra

  1. Engine misfires or hesitation during acceleration.
  2. Difficulty starting the engine or frequent stalling.
  3. Reduced fuel efficiency and increased fuel consumption.
  4. Illumination of the check engine light on the dashboard.
  5. Rough idling or irregular engine performance.

How to Fix P1002 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the fuel pump driver control module and related wiring harness for any visible damage or corrosion.
  2. Test the voltage output of the fuel pump control module using a multimeter to determine if it falls within the acceptable range.
  3. Check the fuel pump relay and fuse for proper functionality and replace them if necessary.
  4. If the control module is deemed faulty, replace it with a new unit and ensure proper programming and calibration.
  5. Clear the DTC from the vehicle's computer system and perform a test drive to verify that the issue has been resolved.

Cost to Fix P1002 2016 GMC Sierra

The typical repair costs for addressing the P1002 code on a 2016 GMC Sierra can vary depending on the extent of the issue and the specific parts that need replacement. On average, the cost for parts such as a new fuel pump driver control module and related components can range from $200 to $500. Labor costs for diagnosing and repairing this issue can range from $150 to $300, depending on the shop's hourly rates and the complexity of the repair process. It is advisable to consult with a certified mechanic or auto repair shop for an accurate cost estimate based on your vehicle's specific needs and location.

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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 2016 GMC Sierra Code

1. What does the OBDII code P1002 mean on a 2016 GMC Sierra?

P1002 indicates a problem with the Fuel Pump Driver Control Module (FPCM) system voltage performance, suggesting an issue with voltage levels or communication between the module and other components.

2. What are the common symptoms of code P1002 in a 2016 GMC Sierra?

Common symptoms include difficulty starting the engine, reduced fuel efficiency, engine hesitation, stalling, or a Check Engine Light illuminated on the dashboard.

3. What causes the P1002 code to appear on a 2016 GMC Sierra?

Possible causes include a faulty Fuel Pump Driver Control Module, wiring issues such as shorts or damaged connectors, a failing fuel pump, or issues with the vehicle's power supply to the module.

4. Can driving with code P1002 damage my 2016 GMC Sierra?

Driving with this code can lead to engine performance issues and potential damage to the fuel system if left unresolved, so it’s best to address it as soon as possible.

5. How do you diagnose the P1002 code on a 2016 GMC Sierra?

Diagnosis typically involves scanning for additional codes, inspecting the wiring and connectors to the FPCM, testing the fuel pump, and checking the voltage at the module.

6. How do you fix the P1002 code on a 2016 GMC Sierra?

Repairs may involve replacing the Fuel Pump Driver Control Module, repairing or replacing damaged wiring or connectors, or addressing power supply issues.

7. Can a weak battery trigger the P1002 code on a 2016 GMC Sierra?

Yes, a weak or failing battery can cause low voltage issues, which may trigger the P1002 code in the Fuel Pump Driver Control Module system.

8. Is the fuel pump itself likely to be the cause of the P1002 code?

While it's less common, a failing fuel pump can cause voltage inconsistencies in the system, contributing to the P1002 code.

9. Does the P1002 code require reprogramming the fuel pump driver control module?

In some cases, reprogramming or updating the module's software may be necessary if it’s determined to be a software-related issue.

10. How much does it cost to repair the P1002 code on a 2016 GMC Sierra?

Repair costs vary but typically range from $150 to $500 depending on whether the issue is with wiring, the Fuel Pump Driver Control Module, or the fuel pump itself.

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