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P129B 2017 Chevrolet Silverado Code - Fuel Pump Driver Control Module System Voltage Low

Quick Answer

The P129B diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the Fuel Pump Driver Control Module System Voltage being low. Common causes include Faulty Fuel Pump Driver Control Module, Damaged wiring or connectors in the fuel pump circuit, Weak battery or alternator. 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
P129B 2017 Chevrolet Silverado indicates Fuel Pump Driver Control Module System Voltage Low.
Common causes
Common causes include Faulty Fuel Pump Driver Control Module, Damaged wiring or connectors in the fuel pump circuit, Weak battery or alternator.
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 16, 2024
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Code P129B 2017 Chevrolet Silverado Description

The P129B diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the Fuel Pump Driver Control Module System Voltage being low. The Fuel Pump Driver Control Module (FPDM) is a crucial component in the fuel delivery system of the vehicle. It controls the operation of the fuel pump, which is responsible for supplying fuel to the engine. When the system voltage is detected as low, it means that there is an issue with the power supply to the FPDM, which can lead to various performance issues.

OBDII Code P129B 2017 Chevrolet Silverado - Fuel Pump Driver Control Module System Voltage Low
P129B 2017 Chevrolet Silverado Code - Fuel Pump Driver Control Module System Voltage Low

Common Causes of P129B 2017 Chevrolet Silverado

  1. Faulty Fuel Pump Driver Control Module
  2. Damaged wiring or connectors in the fuel pump circuit
  3. Weak battery or alternator
  4. Electrical system issues
  5. Corrosion or poor connections in the electrical system

Symptoms of P129B 2017 Chevrolet Silverado

  1. Engine misfires or hesitation during acceleration
  2. Difficulty starting the vehicle
  3. Reduced fuel efficiency
  4. Illumination of the check engine light
  5. Stalling or engine shutdown while driving

How to Fix P129B 2017 Chevrolet Silverado

  1. Diagnose the issue using a scan tool to verify the P129B code and check the voltage levels in the fuel pump circuit.
  2. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as needed.
  3. Test the battery and alternator to ensure they are providing sufficient power to the FPDM.
  4. Replace the Fuel Pump Driver Control Module if it is found to be faulty.
  5. Clear the DTC and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P129B 2017 Chevrolet Silverado

The typical repair costs for addressing a P129B code on a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of replacing a Fuel Pump Driver Control Module can range from $200 to $500, including parts and labor. Additional costs may apply if there are other components that need to be repaired or replaced. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate 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 P129B 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P129B in a 2017 Chevrolet Silverado?

The common symptoms of OBDII code P129B in a 2017 Chevrolet Silverado include engine stalling, poor vehicle performance, and the illumination of the check engine light.

2. What causes the OBDII code P129B in a 2017 Chevrolet Silverado?

The OBDII code P129B in a 2017 Chevrolet Silverado is typically caused by low voltage in the fuel pump driver control module system.

3. How serious is the OBDII code P129B in a 2017 Chevrolet Silverado?

The OBDII code P129B in a 2017 Chevrolet Silverado can affect the vehicle's performance and may lead to engine stalling. It is important to address this issue promptly.

4. Can I continue driving my 2017 Chevrolet Silverado with the OBDII code P129B?

It is not recommended to continue driving your 2017 Chevrolet Silverado with the OBDII code P129B, as it may lead to further damage and potential safety hazards.

5. How can I diagnose the OBDII code P129B in my 2017 Chevrolet Silverado?

Diagnosing the OBDII code P129B in a 2017 Chevrolet Silverado typically involves checking the fuel pump driver control module system voltage using a diagnostic scanner.

6. What are some repair tips for fixing the OBDII code P129B in a 2017 Chevrolet Silverado?

Repair tips for fixing the OBDII code P129B in a 2017 Chevrolet Silverado include checking the wiring and connections to the fuel pump driver control module, and potentially replacing the module if necessary.

7. Can a DIY enthusiast fix the OBDII code P129B in a 2017 Chevrolet Silverado?

While some enthusiasts may have the skills to address the OBDII code P129B in a 2017 Chevrolet Silverado, it is recommended to consult a professional mechanic for proper diagnosis and repair.

8. How much does it cost to repair the OBDII code P129B in a 2017 Chevrolet Silverado?

The cost of repairing the OBDII code P129B in a 2017 Chevrolet Silverado can vary depending on the extent of the issue and whether parts need to be replaced. It is advisable to obtain quotes from local mechanics.

9. Is the OBDII code P129B common in 2017 Chevrolet Silverado vehicles?

The OBDII code P129B related to the fuel pump driver control module system voltage low is not extremely common, but it can occur in 2017 Chevrolet Silverado vehicles due to various factors.

10. Can a faulty fuel pump cause the OBDII code P129B in a 2017 Chevrolet Silverado?

While a faulty fuel pump itself may not directly cause the OBDII code P129B in a 2017 Chevrolet Silverado, issues with the fuel pump driver control module system voltage low can contribute to the code being triggered.

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