P129C 2016 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 2016 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.
Code P129C 2016 Chevrolet Silverado Description
What are the Possible Causes of the DTC P129C 2016 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 2016 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 2016 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.
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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.
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