P129D 2016 Chevrolet Silverado Code - Fuel Pump Driver Control Module Ignition On/Start Switch Circuit Low Voltage
Quick Answer
The P129D diagnostic trouble code (DTC) on a 2016 Chevrolet Silverado refers to a problem with the Fuel Pump Driver Control Module Ignition On/Start Switch Circuit having low voltage. Common causes include Faulty Fuel Pump Driver Control Module, Wiring or connection issues in the ignition on/start switch circuit, Low voltage in the vehicle's electrical system. 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 Driver Control Module, Wiring or connection issues in the ignition on/start switch circuit, Low voltage in the vehicle's electrical system.
- 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.
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Code P129D 2016 Chevrolet Silverado Description
The P129D diagnostic trouble code (DTC) on a 2016 Chevrolet Silverado refers to a problem with the Fuel Pump Driver Control Module Ignition On/Start Switch Circuit having low voltage. This code indicates that the voltage levels in the circuit that controls the fuel pump driver module are below the specified range, causing the module to not function correctly. The fuel pump driver control module plays a crucial role in controlling the fuel pump's operation, ensuring the right amount of fuel is delivered to the engine for optimal performance. When this circuit experiences low voltage, it can lead to various issues affecting the vehicle's performance and drivability.
Common Causes of P129D 2016 Chevrolet Silverado
- Faulty Fuel Pump Driver Control Module
- Wiring or connection issues in the ignition on/start switch circuit
- Low voltage in the vehicle's electrical system
- Defective fuel pump
- Corrosion or damage to electrical connectors
Symptoms of P129D 2016 Chevrolet Silverado
- Engine stalling or hesitation during acceleration
- Rough idling or misfiring
- Difficulty starting the vehicle
- Decreased fuel efficiency
- Illumination of the check engine light
How to Fix P129D 2016 Chevrolet Silverado
- Diagnostic Testing: Begin by using a diagnostic tool to verify the P129D code and pinpoint the exact cause of the low voltage issue.
- Inspect Wiring and Connections: Check the wiring and connections in the ignition on/start switch circuit for any damage, corrosion, or loose connections. Repair or replace as necessary.
- Test Fuel Pump Driver Control Module: Test the fuel pump driver control module to ensure it is functioning correctly. Replace if faulty.
- Check Fuel Pump: Inspect the fuel pump for any signs of damage or wear. Replace if necessary.
- Clear Codes and Test Drive: After making the repairs, clear the DTCs from the vehicle's computer system and test drive the vehicle to ensure the issue is resolved.
Cost to Fix P129D 2016 Chevrolet Silverado
The typical repair costs for addressing a P129D code on a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue. On average, the cost of parts for this repair can range from $200 to $500, while labor costs can range from $100 to $300. However, it's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the mechanic's rates. It's advisable to consult with a trusted auto repair shop for a more accurate estimate based on your specific situation.
Tech Notes for P129D 2016 Chevrolet Silverado
2016-2018 Chevrolet Silverado 1500
2019 Chevrolet Silverado LD
Dead Battery / P1682 P129D P10E4 P2535 / Crank No Start
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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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