AutoCodes – Chevrolet – P0627 2018 Chevrolet Silverado

P0627 2018 Chevrolet Silverado Code - Fuel Pump Speed Output Circuit

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: P0627 2018 Chevrolet Silverado indicates Fuel Pump Speed Output Circuit.
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.

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Code Popularity 333

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 15, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0627 2018 Chevrolet Silverado Description

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. While this voltage is being received, a serial data signal containing the desired fuel pump speed is also received from the ECM. After the voltage and data have been received the fuel pump driver control module actuates the brushless fuel pump by means of a high power three phase signal. The Diagnostic Trouble Code (DTC) will be set when the Fuel Pump Speed Output Circuit is open for greater than 2 s.

OBDII Code P0627 2018 Chevrolet Silverado - Fuel Pump Speed Output Circuit - AutoCodes.com — P0627 2018 Chevrolet Silverado Code - Fuel Pump Speed Output Circuit

What does this mean?

What are the Possible Causes of the DTC P0627 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 P0627 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 P0627 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.

Need more information about the P0627 2018 Chevrolet Silverado code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0627 2018 Chevrolet Silverado Code

1. What does OBDII code P0627 mean on a 2018 Chevrolet Silverado?

Code P0627 indicates an issue with the fuel pump control module, specifically a problem in the fuel pump speed output circuit.

2. What are the common symptoms of code P0627 in a 2018 Chevrolet Silverado?

Symptoms may include difficulty starting the engine, stalling, reduced engine performance, and the Check Engine Light turning on.

3. What causes the P0627 code to appear on a Chevrolet Silverado?

Common causes include a faulty fuel pump, damaged wiring or connectors in the fuel pump speed circuit, a failing fuel pump control module, or a malfunctioning PCM (Powertrain Control Module).

4. Can I drive my 2018 Chevrolet Silverado with code P0627?

Driving with code P0627 is not recommended as it may lead to stalling or further damage to the fuel delivery system.

5. How do I diagnose code P0627 on a 2018 Chevrolet Silverado?

Diagnosis involves checking the fuel pump and its connections, inspecting the wiring and connectors for damage or corrosion, and testing the fuel pump control module and PCM.

6. How is code P0627 typically repaired on a Chevrolet Silverado?

Repairs may include replacing the fuel pump, repairing damaged wiring or connectors, or replacing the fuel pump control module if it is found to be defective.

7. Will a faulty fuel pump always cause code P0627 in a 2018 Chevrolet Silverado?

Not always. While a faulty fuel pump is a common cause, issues with the wiring, connectors, or control module can also trigger this code.

8. How much does it cost to fix code P0627 on a Chevrolet Silverado?

The cost depends on the root cause. Replacing a fuel pump can cost $300-$1,000, while repairing wiring or connectors may be less expensive. A fuel pump control module replacement can cost $200-$500.

9. Can a bad PCM cause the P0627 code in a 2018 Chevrolet Silverado?

Yes, though itâ€™s less common, a malfunctioning PCM can cause this code if it fails to properly communicate with the fuel pump control module.

10. How can I prevent code P0627 from occurring again on my Chevrolet Silverado?

Regular maintenance, including inspecting the fuel pump system, keeping electrical connections clean and secure, and addressing issues promptly, can help prevent this code from reappearing.