AutoCodesChevrolet – P129C 2014 Chevrolet Silverado

P129C 2014 Chevrolet Silverado 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 2014 Chevrolet Silverado 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 286
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 04, 2022
💬 Need more help? Ask Coddy for instant answers — it's free!

Code P129C 2014 Chevrolet Silverado 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 2014 Chevrolet Silverado - Fuel Pump Driver Control Module System Voltage High - AutoCodes.com
P129C 2014 Chevrolet Silverado Code - Fuel Pump Driver Control Module System Voltage High

What are the Possible Causes of the DTC P129C 2014 Chevrolet Silverado?

  • 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 2014 Chevrolet Silverado?

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 2014 Chevrolet Silverado 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 2014 Chevrolet Silverado code?

Need more information on how to fix the P129C 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P129C 2014 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 2014 Chevrolet Silverado Code

What does the OBDII code P129C mean for a 2014 Chevrolet Silverado?

P129C indicates that the Fuel Pump Driver Control Module is detecting a high voltage condition in its system.

What are common symptoms associated with the P129C code?

Common symptoms include engine performance issues, stalling, difficulty starting, or the check engine light illuminating.

What could cause the P129C code to trigger?

Possible causes include a faulty fuel pump driver module, wiring issues, a bad fuel pump, or problems with the vehicle's electrical system.

How can I diagnose the P129C code?

Start with a visual inspection of the fuel pump driver module and wiring, followed by checking voltage and ground signals to the module using a multimeter.

What are some common repairs for the P129C code?

Repairs may involve replacing the fuel pump driver module, fixing wiring issues, or replacing the fuel pump if it’s found to be faulty.

Is it safe to drive with the P129C code?

While it may be possible to drive, it is not advisable as it could lead to engine stalling or performance issues, which may pose a safety risk.

Can I reset the check engine light after fixing the P129C code?

Yes, once the issue is repaired, you can use an OBDII scanner to clear the code and reset the check engine light.

How much does it typically cost to repair the P129C code?

Repair costs can vary widely depending on the specific issue, but it may range from $100 to $600, depending on parts and labor.

Are there any preventative measures to avoid the P129C code?

Regular maintenance of the fuel system and electrical components, along with addressing any electrical issues promptly, can help prevent this code from occurring.

Discuss the causes and fixes for P129C 2014 Chevrolet Silverado OBDII Code

Code P129C 2014 Chevrolet Silverado comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play