P129C 2016 Chevrolet Silverado Code - Fuel Pump Driver Control Module System Voltage High
Quick Answer
The P129C diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado indicates a problem with the Fuel Pump Driver Control Module System Voltage being too high. Common causes include Faulty Fuel Pump Driver Control Module, Wiring issues such as shorts or high resistance, Electrical system problems. 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 2016 Chevrolet Silverado indicates Fuel Pump Driver Control Module System Voltage High.
- Common causes
- Common causes include Faulty Fuel Pump Driver Control Module, Wiring issues such as shorts or high resistance, Electrical system problems.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P129C 2016 Chevrolet Silverado Description
The P129C diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado indicates a problem with the Fuel Pump Driver Control Module System Voltage being too high. The Fuel Pump Driver Control Module (FPDM) is a crucial component in the vehicle's fuel system, responsible for controlling the fuel pump's operation. When the system voltage is detected to be high, it means that the voltage supplied to the FPDM is exceeding the specified parameters, which can lead to various issues.
Common Causes of P129C 2016 Chevrolet Silverado
- Faulty Fuel Pump Driver Control Module.
- Wiring issues such as shorts or high resistance.
- Electrical system problems.
- Voltage regulator malfunction.
- Power supply issues to the FPDM.
Symptoms of P129C 2016 Chevrolet Silverado
- Check Engine Light illuminated on the dashboard.
- Decreased fuel efficiency.
- Engine misfires or hesitation during acceleration.
- Difficulty starting the vehicle.
- Rough idling or stalling while driving.
How to Fix P129C 2016 Chevrolet Silverado
- Begin by using a diagnostic scanner to confirm the P129C code and identify the specific cause of the high voltage issue.
- Inspect the wiring harness connected to the FPDM for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
- Test the voltage regulator and power supply to the FPDM to ensure they are functioning correctly. Replace any faulty components.
- If the FPDM is determined to be faulty, replace it with a new unit and program it to the vehicle's specifications.
- Clear the DTC and perform a test drive to verify that the issue has been resolved and that the vehicle is operating normally.
Cost to Fix P129C 2016 Chevrolet Silverado
The typical repair costs for addressing a P129C code on a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue and the parts needed for repair. In general, the cost of replacing a faulty Fuel Pump Driver Control Module can range from $200 to $500, including parts and labor. However, additional costs may apply if wiring repairs or voltage regulator replacement are necessary. It's recommended to consult with a trusted mechanic or dealership for a more accurate estimate based on the specific circumstances of the vehicle. Keep in mind that labor rates can vary widely, so it's advisable to inquire about rates in your local area for a more precise cost estimate.
Need more information about the P129C 2016 Chevrolet Silverado code?
Need more information on how to fix the P129C 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P129C 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P129C 2016 Chevrolet Silverado Code
1. What does the OBDII code P129C mean for a 2016 Chevrolet Silverado?
P129C indicates that the Fuel Pump Driver Control Module (FPCM) has detected a system voltage higher than the expected range.
2. What are the common symptoms of code P129C in a 2016 Chevrolet Silverado?
Symptoms may include poor engine performance, difficulty starting, reduced fuel efficiency, or a check engine light.
3. What causes the P129C code to appear on a 2016 Chevrolet Silverado?
Common causes include a faulty fuel pump driver control module, wiring issues like damaged or corroded connectors, or a problem with the vehicle's electrical system, such as an overcharging alternator.
4. Can a bad alternator cause the P129C code?
Yes, an overcharging alternator can supply excessive voltage to the Fuel Pump Driver Control Module, triggering the P129C code.
5. How do you diagnose the P129C code on a 2016 Chevrolet Silverado?
Diagnosing involves using a scan tool to check for related codes, inspecting the FPCM and its wiring for damage, and testing the vehicle's charging system for overvoltage.
6. Is the Fuel Pump Driver Control Module always the problem with P129C?
Not always. While the FPCM can fail, the issue could also stem from wiring problems, a faulty alternator, or poor connections.
7. How do you fix the P129C code on a 2016 Chevrolet Silverado?
Repairs may include replacing the Fuel Pump Driver Control Module, repairing or replacing damaged wiring, cleaning corroded connectors, or addressing alternator overcharging issues.
8. Can I drive my 2016 Chevrolet Silverado with the P129C code?
Driving with this code is not recommended, as it may lead to poor engine performance and potential fuel delivery issues that could leave you stranded.
9. How much does it cost to fix a P129C code on a 2016 Chevrolet Silverado?
Repair costs vary but can range from $200 to $600, depending on whether the issue is with the FPCM, wiring, or charging system components.
10. Do I need to clear the P129C code after repairs?
Yes, after completing repairs, the code should be cleared with a scan tool to verify the issue is resolved and to turn off the check engine light.
Discuss the causes and fixes for P129C 2016 Chevrolet Silverado OBDII Code
Code P129C 2016 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.