AutoCodes – Chevrolet – P129C Chevrolet

P129C Chevrolet Code - Fuel Pump Driver Control Module System Voltage High

Quick Answer

The Fuel Pump Power Control Module monitors the battery positive voltage circuit to verify the 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: P129C Chevrolet indicates Fuel Pump Driver Control Module System Voltage High.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,764

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P129C Chevrolet Description

The Fuel Pump Power Control Module monitors the battery positive voltage circuit to verify the voltage is within the normal operating range. The Diagnostic Trouble Code (DTC) will be set when the Fuel Pump Driver Control Module detects the battery positive voltage is greater than 18 V for 1 s.

OBDII Code P129C Chevrolet - Fuel Pump Driver Control Module System Voltage High - AutoCodes.com — P129C Chevrolet Code - Fuel Pump Driver Control Module System Voltage High

What does this mean?

What are the Possible Causes of the DTC P129C Chevrolet?

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 P129C Chevrolet?

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 P129C Chevrolet 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 P129C Chevrolet code?

Need more information on how to fix the P129C Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P129C Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P129C 2014 Chevrolet Silverado — Fuel Pump Driver Control Module System Voltage High
P129C 2015 Chevrolet Silverado — Fuel Pump Driver Control Module System Voltage High
P129C 2016 Chevrolet Silverado — Fuel Pump Driver Control Module System Voltage High
P129C 2017 Chevrolet Silverado — Fuel Pump Driver Control Module System Voltage High
P129C 2018 Chevrolet Silverado — Fuel Pump Driver Control Module System Voltage High

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 P129C Chevrolet Code

1. What are the common symptoms of OBDII code P129C in a Chevrolet related to the Fuel Pump Driver Control Module System Voltage High?

The common symptoms include the check engine light illuminating, reduced engine performance, decreased fuel efficiency, and potential issues with starting the vehicle.

2. What are the possible causes of OBDII code P129C in a Chevrolet indicating Fuel Pump Driver Control Module System Voltage High?

Potential causes may include a faulty fuel pump driver control module, wiring or connector issues, a malfunctioning fuel pump, or a problem with the vehicle's powertrain control module.

3. How can I diagnose the OBDII code P129C in a Chevrolet related to the Fuel Pump Driver Control Module System Voltage High?

Diagnosis typically involves using an OBDII scanner to retrieve the code, conducting a visual inspection of the fuel pump driver control module and associated components, and performing electrical tests to pinpoint the issue.

4. Is it safe to continue driving with OBDII code P129C in a Chevrolet indicating Fuel Pump Driver Control Module System Voltage High?

It is not recommended to continue driving with this code present, as it can lead to potential fuel system issues and affect the overall performance and reliability of the vehicle.

5. What are some repair tips for addressing OBDII code P129C in a Chevrolet related to Fuel Pump Driver Control Module System Voltage High?

Repair tips may include checking and repairing any damaged wiring or connectors, replacing the fuel pump driver control module if necessary, ensuring proper power supply to the fuel pump, and clearing the fault code after repairs are completed.

6. Can a DIY enthusiast fix OBDII code P129C in a Chevrolet indicating Fuel Pump Driver Control Module System Voltage High?

While some basic diagnostic steps can be performed by a knowledgeable DIY enthusiast, addressing the root cause of the issue may require specialized tools and expertise, making professional assistance advisable in many cases.

7. How much does it typically cost to repair OBDII code P129C in a Chevrolet related to Fuel Pump Driver Control Module System Voltage High?

The cost of repair can vary depending on the underlying cause of the issue, parts needed for replacement, and labor charges. It is recommended to obtain quotes from reputable mechanics or service centers.

8. Can a faulty fuel pump cause OBDII code P129C in a Chevrolet related to Fuel Pump Driver Control Module System Voltage High?

Yes, a malfunctioning fuel pump can contribute to triggering this fault code, as it may affect the voltage levels within the fuel pump driver control module system.

9. How urgent is it to address OBDII code P129C in a Chevrolet related to Fuel Pump Driver Control Module System Voltage High?

It is advisable to address this code promptly to prevent potential damage to the fuel system components, ensure proper vehicle performance, and avoid potential safety risks associated with fuel delivery issues.

10. Are there any recalls or technical service bulletins related to OBDII code P129C in Chevrolet vehicles concerning Fuel Pump Driver Control Module System Voltage High?

It is recommended to check with a Chevrolet dealership or online resources for any relevant recalls or technical service bulletins related to this specific OBDII code to stay informed about potential manufacturer-acknowledged issues and solutions.