P0629 2018 Chevrolet Silverado Code - Fuel Pump Speed Output Circuit High Voltage
Quick Answer
The P0629 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado refers to the Fuel Pump Speed Output Circuit High Voltage. Common causes include Faulty fuel pump speed control module, Damaged wiring harness or connectors in the fuel pump speed output circuit, Malfunctioning fuel pump. 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
- P0629 2018 Chevrolet Silverado indicates Fuel Pump Speed Output Circuit High Voltage.
- Common causes
- Common causes include Faulty fuel pump speed control module, Damaged wiring harness or connectors in the fuel pump speed output circuit, Malfunctioning fuel pump.
- 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 P0629 2018 Chevrolet Silverado Description
The P0629 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado refers to the Fuel Pump Speed Output Circuit High Voltage. This code indicates that the powertrain control module (PCM) has detected a higher than normal voltage in the fuel pump speed output circuit. The fuel pump speed output circuit is responsible for controlling the fuel pump's speed based on the engine's demand for fuel. When the PCM detects a high voltage in this circuit, it can lead to various issues with the fuel delivery system, potentially affecting the vehicle's performance and fuel efficiency.
Common Causes of P0629 2018 Chevrolet Silverado
- Faulty fuel pump speed control module.
- Damaged wiring harness or connectors in the fuel pump speed output circuit.
- Malfunctioning fuel pump.
- Issues with the PCM or other related control modules.
- Electrical shorts or open circuits in the fuel pump speed output circuit.
Symptoms of P0629 2018 Chevrolet Silverado
- Engine misfires or hesitation during acceleration.
- Reduced fuel efficiency.
- Engine stalling or difficulty starting.
- Illumination of the check engine light.
- Rough idling or uneven engine performance.
How to Fix P0629 2018 Chevrolet Silverado
- Begin by using a scan tool to diagnose the P0629 code and verify the issue.
- Inspect the wiring harness and connectors in the fuel pump speed output circuit for any damage or corrosion. Repair or replace as needed.
- Test the fuel pump speed control module and the fuel pump itself to ensure they are functioning correctly. Replace any faulty components.
- Clear the DTC and perform a test drive to verify that the issue has been resolved.
- If the problem persists, further diagnostics may be necessary to pinpoint the exact cause of the high voltage in the fuel pump speed output circuit.
Cost to Fix P0629 2018 Chevrolet Silverado
The typical repair costs for addressing a P0629 code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of parts such as a fuel pump speed control module or a new fuel pump can range from $200 to $500, while labor costs can add an additional $100 to $200. Overall, the total repair cost for this issue may fall between $300 and $700. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your location and vehicle specifics.
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