P129D 2016 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 2016 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 2016 Chevrolet Silverado Description
What are the Possible Causes of the DTC P129D 2016 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 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.
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 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 P129D 2016 Chevrolet Silverado Code
1. What does the OBDII code P129D mean on a 2016 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 common symptoms of the P129D code?
Symptoms include difficulty starting the engine, stalling, reduced engine performance, and the check engine light being illuminated.
3. What causes the P129D code to appear?
Common causes include a faulty Fuel Pump Driver Control Module, damaged wiring or connectors in the ignition/start circuit, or a weak battery.
4. Can a low battery cause the P129D code?
Yes, a weak or failing battery can result in low voltage and trigger the P129D code.
5. How can I diagnose the P129D code?
Start by checking the battery voltage, inspecting the wiring and connectors around the Fuel Pump Driver Control Module, and testing the module itself for faults.
6. Is it safe to drive with the P129D code on my Silverado?
Driving with this code is not recommended as it can lead to stalling or difficulty starting the engine, increasing the risk of being stranded.
7. How do I fix the P129D code on a 2016 Silverado?
Possible fixes include replacing the Fuel Pump Driver Control Module, repairing damaged wiring, or replacing the battery if it's weak.
8. Where is the Fuel Pump Driver Control Module located on a 2016 Chevrolet Silverado?
The module is typically located near the fuel tank or along the frame rail, depending on the vehicle configuration.
9. How much does it cost to repair the P129D code?
Repair costs can vary but typically range from $150 to $600, depending on whether the issue is wiring-related or requires a new Fuel Pump Driver Control Module.
10. Can I reset the P129D code without repairs?
You can clear the code with an OBDII scanner, but if the underlying issue isn't fixed, the code will likely return.
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