P129D 2017 Chevrolet Silverado Code - Fuel Pump Driver Control Module Ignition On/Start Switch Circuit Low Voltage
Quick Answer
The Fuel Pump Power Control Module monitors the ignition voltage circuit to determine if the voltage is within the normal operating range. Common causes include Faulty Fuel Pump Power Control Module, Fuel Pump Power Control Module harness is open or shorted, Fuel Pump Power 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
- P129D 2017 Chevrolet Silverado indicates Fuel Pump Driver Control Module Ignition On/Start Switch Circuit Low Voltage.
- Common causes
- Common causes include Faulty Fuel Pump Power Control Module, Fuel Pump Power Control Module harness is open or shorted, Fuel Pump Power 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 P129D 2017 Chevrolet Silverado Description
What are the Possible Causes of the DTC P129D 2017 Chevrolet Silverado?
- Faulty Fuel Pump Power Control Module
- Fuel Pump Power Control Module harness is open or shorted
- Fuel Pump Power Control Module circuit poor electrical connection
How to Fix the DTC P129D 2017 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.
Code Tech Notes
2016-2018 Chevrolet Silverado 1500
2019 Chevrolet Silverado LD
Dead Battery / P1682 P129D P10E4 P2535 / Crank No Start
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P129D 2017 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 P129D 2017 Chevrolet Silverado Code
1. What does OBDII code P129D mean on a 2017 Chevrolet Silverado?
P129D indicates a low voltage issue in the Fuel Pump Driver Control Module (FPCM) ignition on/start switch circuit.
2. What are the symptoms of code P129D on a Chevy Silverado?
Common symptoms include difficulty starting the engine, reduced fuel efficiency, engine stalling, or the engine failing to start altogether.
3. What causes the P129D code to appear on a 2017 Silverado?
Potential causes include a faulty Fuel Pump Driver Control Module, damaged wiring or connectors in the FPCM circuit, a weak battery, or a malfunctioning ignition switch.
4. Can a bad fuel pump trigger the P129D code?
While a failing fuel pump itself may not directly trigger P129D, related issues like a malfunctioning FPCM or wiring problems can disrupt fuel delivery and cause this code.
5. How do you diagnose a P129D code on a 2017 Silverado?
Diagnosis involves checking the battery voltage, inspecting the FPCM wiring and connectors for damage, testing the ignition switch, and verifying the FPCM's functionality with a multimeter or scan tool.
6. Can a loose connection cause the P129D code?
Yes, a loose or corroded connection in the FPCM circuit can result in low voltage and trigger the P129D code.
7. How do you fix the P129D code on a 2017 Silverado?
Repairs may include replacing the Fuel Pump Driver Control Module, repairing damaged wiring or connectors, cleaning corroded terminals, or addressing any issues with the ignition switch.
8. Is it safe to drive with a P129D code?
Driving with a P129D code is not recommended, as it may lead to engine stalling or starting issues, potentially leaving you stranded.
9. How much does it cost to repair a P129D code on a Chevy Silverado?
Repair costs vary but can range from $100 to $500, depending on whether the issue is related to wiring, the FPCM, or the ignition switch.
10. Can clearing the P129D code resolve the issue?
Clearing the code without addressing the underlying problem may temporarily turn off the check engine light, but the issue will likely return. Proper diagnosis and repair are necessary.
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