P129D 2017 GMC Sierra Code - Fuel Pump Driver Control Module Ignition On/Start Switch Circuit Low Voltage
Quick Answer
The P129D diagnostic trouble code indicates a problem with the Fuel Pump Driver Control Module Ignition On/Start Switch Circuit in a 2017 GMC Sierra. Common causes include Faulty Fuel Pump Driver Control Module, Wiring issues or loose connections in the ignition on/start switch circuit, Low battery voltage or a weak 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 2017 GMC Sierra 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 issues or loose connections in the ignition on/start switch circuit, Low battery voltage or a weak 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 2017 GMC Sierra Description
The P129D diagnostic trouble code indicates a problem with the Fuel Pump Driver Control Module Ignition On/Start Switch Circuit in a 2017 GMC Sierra. This code specifically points to low voltage in the circuit, which can lead to issues with the fuel pump driver control module's ability to function properly. The fuel pump driver control module plays a crucial role in regulating the fuel pump's operation, ensuring that the right amount of fuel is delivered to the engine at all times.
Common Causes of P129D 2017 GMC Sierra
- Faulty Fuel Pump Driver Control Module.
- Wiring issues or loose connections in the ignition on/start switch circuit.
- Low battery voltage or a weak electrical system.
- Corrosion or damage to electrical connectors related to the fuel pump circuit.
- Issues with the fuel pump relay or fuse.
Symptoms of P129D 2017 GMC Sierra
- Engine misfires or hesitation during acceleration.
- Difficulty starting the engine or extended cranking time.
- Reduced fuel efficiency and increased fuel consumption.
- Illumination of the check engine light.
- Engine stalling or shutting off unexpectedly while driving.
How to Fix P129D 2017 GMC Sierra
- Begin by conducting a thorough visual inspection of the wiring and connectors in the ignition on/start switch circuit.
- Test the battery voltage and ensure it meets the manufacturer's specifications.
- Check the fuel pump driver control module for any signs of damage or malfunction.
- Replace any faulty components, such as the fuel pump driver control module or damaged wiring.
- Clear the diagnostic trouble codes and perform a test drive to verify that the issue has been resolved.
Cost to Fix P129D 2017 GMC Sierra
The typical repair costs for addressing a P129D code in a 2017 GMC Sierra can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's essential to consider additional expenses for diagnostic testing and any necessary replacement parts. As mentioned earlier, labor rates can vary, so it's recommended to inquire with local auto repair shops for a more accurate estimate.
Tech Notes for P129D 2017 GMC Sierra
2016-2018 Chevrolet Silverado 1500
2019 Chevrolet Silverado LD
Dead Battery / P1682 P129D P10E4 P2535 / Crank No Start
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