P0628 2017 GMC Sierra Code - Fuel Pump Speed Output Circuit Low Voltage
Quick Answer
The Engine Control Module (ECM) supplies voltage to the fuel pump driver control module for 30 s when the ignition is on and continuously when the engine is running. Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver 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
- P0628 2017 GMC Sierra indicates Fuel Pump Speed Output Circuit Low Voltage.
- Common causes
- Common causes include Faulty Fuel Pump Driver Control Module, Fuel Pump Driver Control Module harness is open or shorted, Fuel Pump Driver 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 P0628 2017 GMC Sierra Description
What are the Possible Causes of the DTC P0628 2017 GMC Sierra?
- Faulty Fuel Pump Driver Control Module
- Fuel Pump Driver Control Module harness is open or shorted
- Fuel Pump Driver Control Module circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0628 2017 GMC Sierra?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0628 2017 GMC Sierra 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 P0628 2017 GMC Sierra Code
1. What does the OBDII code P0628 mean for a 2017 GMC Sierra?
P0628 indicates that the fuel pump control module has detected low voltage in the fuel pump speed output circuit.
2. What are the symptoms of code P0628 in a 2017 GMC Sierra?
Symptoms can include difficulty starting, engine stalling, reduced fuel efficiency, and potentially a check engine light.
3. What causes code P0628 in a 2017 GMC Sierra?
Common causes include a faulty fuel pump, damaged wiring or connectors, a defective fuel pump relay, or issues with the fuel pump control module.
4. Can code P0628 cause engine damage if ignored?
While it may not directly cause engine damage, prolonged fuel delivery issues can lead to engine performance problems and potentially damage components over time.
5. How is code P0628 diagnosed in a 2017 GMC Sierra?
A mechanic will check the fuel pump circuit for low voltage, inspect wiring and connectors, test the fuel pump relay, and evaluate the fuel pump control module for proper operation.
6. Can I drive my 2017 GMC Sierra with code P0628?
It’s not recommended, as the vehicle may experience stalling or fail to start, potentially leaving you stranded.
7. How do you fix code P0628 in a 2017 GMC Sierra?
Repairs may involve replacing the fuel pump, repairing damaged wiring or connectors, replacing the fuel pump relay, or replacing the fuel pump control module.
8. What tools are needed to fix code P0628?
Basic tools include a multimeter to test voltage, wiring repair tools, and potentially a scan tool to clear the code after repairs are completed.
9. How much does it cost to repair code P0628 in a 2017 GMC Sierra?
Repair costs vary depending on the specific issue, ranging from $150 for a relay replacement to over $1,000 for a fuel pump replacement.
10. Can code P0628 be prevented in a 2017 GMC Sierra?
Regular maintenance, including inspecting wiring and connectors and addressing fuel system issues early, can help prevent this code from occurring.
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