P0628 2014 GMC Sierra Code - Fuel Pump Speed Output Circuit Low Voltage
Quick Answer
The P0628 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the fuel pump speed output circuit having low voltage. Common causes include Faulty fuel pump, Damaged wiring or connectors in the fuel pump speed output circuit, Defective fuel pump relay. 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
- P0628 2014 GMC Sierra indicates Fuel Pump Speed Output Circuit Low Voltage.
- Common causes
- Common causes include Faulty fuel pump, Damaged wiring or connectors in the fuel pump speed output circuit, Defective fuel pump relay.
- 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 P0628 2014 GMC Sierra Description
The P0628 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the fuel pump speed output circuit having low voltage. The fuel pump speed output circuit is responsible for regulating the speed of the fuel pump, which plays a crucial role in delivering fuel from the tank to the engine. When the voltage in this circuit falls below the specified range, it can affect the fuel pump's operation, leading to issues with fuel delivery and potentially causing drivability problems.
Common Causes of P0628 2014 GMC Sierra
- Faulty fuel pump
- Damaged wiring or connectors in the fuel pump speed output circuit
- Defective fuel pump relay
- Issues with the engine control module (ECM)
- Low voltage in the vehicle's electrical system
Symptoms of P0628 2014 GMC Sierra
- Engine misfires or hesitation during acceleration
- Difficulty starting the vehicle
- Reduced fuel efficiency
- Stalling or engine shutdown while driving
- Check engine light illuminated on the dashboard
How to Fix P0628 2014 GMC Sierra
- Begin by using a scan tool to diagnose the P0628 code and verify the fuel pump speed output circuit's low voltage issue.
- Inspect the wiring and connectors in the fuel pump speed output circuit for any signs of damage or corrosion. Repair or replace as necessary.
- Test the fuel pump relay to ensure it is functioning correctly. Replace if faulty.
- Check the fuel pump's operation and replace if found to be defective.
- Clear the DTC and test drive the vehicle to verify that the issue has been resolved.
Cost to Fix P0628 2014 GMC Sierra
The typical repair costs for addressing a P0628 code in a 2014 GMC Sierra can range from $200 to $600, including parts and labor. However, prices may vary depending on the specific diagnosis time, labor rates, and any additional components that may need replacement. It is advisable to consult with a qualified mechanic or auto repair shop to obtain a precise estimate based on the vehicle's make and model, as well as the severity of the issue.
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