AutoCodes – GMC – P0627 2017 GMC Sierra

P0627 2017 GMC Sierra 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 2017 GMC Sierra 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 259

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 2017 GMC Sierra 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 2017 GMC Sierra - Fuel Pump Speed Output Circuit - AutoCodes.com — P0627 2017 GMC Sierra Code - Fuel Pump Speed Output Circuit

What does this mean?

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

Need more information about the P0627 2017 GMC Sierra code?

Need more information on how to fix the P0627 2017 GMC Sierra code? Get Access to Factory Service Manuals

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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 2017 GMC Sierra Code

What does the OBDII code P0627 mean for a 2017 GMC Sierra?

P0627 indicates an issue with the Fuel Pump Speed Output Circuit, which controls the fuel pump's operation and speed.

What are common symptoms of code P0627 in a 2017 GMC Sierra?

Symptoms may include difficulty starting the engine, engine stalling, poor acceleration, and reduced fuel efficiency.

What causes the P0627 code on a GMC Sierra?

Common causes include a faulty fuel pump control module, damaged wiring or connectors in the circuit, or a failing fuel pump.

Can driving with code P0627 damage my 2017 GMC Sierra?

Driving with this code can lead to engine performance issues and may cause further damage if the fuel pump fails completely.

How do I diagnose the P0627 code on my GMC Sierra?

Start by inspecting the wiring and connectors in the fuel pump circuit for damage. Use a scan tool to check for additional codes and test the fuel pump control module.

Can a bad fuel pump trigger the P0627 code?

Yes, a failing fuel pump can cause this code by disrupting the speed output circuit's operation.

How can I fix the P0627 code on my 2017 GMC Sierra?

Repairs may involve replacing the fuel pump control module, repairing damaged wiring, or replacing the fuel pump if itâ€™s faulty.

What tools are needed to fix the P0627 code?

Basic tools include a multimeter for testing electrical connections, a scan tool for diagnostic codes, and potentially specialized tools for fuel pump replacement.

How much does it cost to repair the P0627 code?

Repair costs vary based on the exact cause but can range from $100-$800, depending on whether the fuel pump or control module needs replacement.

Can a software issue cause the P0627 code on a GMC Sierra?

While rare, a software issue in the engine control module (ECM) could contribute to this code. Reprogramming or updating the ECM may resolve it in such cases.