P0628 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0628 2018 Chevrolet Silverado?
- 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 2018 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0628 2018 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 P0628 2018 Chevrolet Silverado Code
1. What does the OBDII code P0628 mean for a 2018 Chevrolet Silverado?
P0628 indicates that the fuel pump speed output circuit is experiencing low voltage, which can affect fuel delivery to the engine.
2. What are the common symptoms of a P0628 code in a 2018 Chevrolet Silverado?
Symptoms include engine stalling, difficulty starting, reduced fuel efficiency, poor acceleration, or the engine not starting at all.
3. What causes the P0628 code to appear in a 2018 Chevrolet Silverado?
Common causes include a faulty fuel pump control module, damaged wiring or connectors in the fuel pump circuit, a failing fuel pump, or a blown fuse.
4. Can I drive my 2018 Chevrolet Silverado with a P0628 code?
Driving with a P0628 code is not recommended, as it can lead to engine stalling or failure to start, potentially leaving you stranded.
5. How do you diagnose the P0628 code on a 2018 Chevrolet Silverado?
Diagnosis involves checking the fuel pump control module, inspecting the wiring and connectors for damage, testing the fuel pump, and verifying proper voltage in the circuit.
6. How much does it cost to fix a P0628 code on a 2018 Chevrolet Silverado?
Repair costs vary depending on the issue. Replacing a fuel pump control module typically costs $200–$600, while fixing wiring issues may cost less.
7. Can a weak battery cause the P0628 code on a 2018 Chevrolet Silverado?
Yes, a weak or failing battery can cause low voltage in the fuel pump circuit, triggering the P0628 code.
8. How can I fix the P0628 code on my 2018 Chevrolet Silverado?
Repairs may include replacing the fuel pump control module, repairing damaged wiring, replacing a faulty fuel pump, or addressing power supply issues.
9. Is a software update needed to fix the P0628 code in some cases?
In rare cases, a software update to the vehicle's Powertrain Control Module (PCM) may resolve the issue if it's related to incorrect system parameters.
10. How can I prevent the P0628 code from reoccurring on my 2018 Chevrolet Silverado?
Regularly inspect and maintain your fuel pump system, ensure wiring and connectors are in good condition, and replace components like the fuel pump or control module as needed.
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