AutoCodes – GMC – P0627 2014 GMC Sierra

P0627 2014 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 2014 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 181

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0627 2014 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 2014 GMC Sierra - Fuel Pump Speed Output Circuit - AutoCodes.com — P0627 2014 GMC Sierra Code - Fuel Pump Speed Output Circuit

What does this mean?

What are the Possible Causes of the DTC P0627 2014 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 2014 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 2014 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 2014 GMC Sierra code?

Need more information on how to fix the P0627 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0627 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2014 GMC Sierra Code

1. What does the OBDII code P0627 mean for a 2014 GMC Sierra?

Code P0627 indicates an issue with the Fuel Pump Speed Output Circuit, which is responsible for controlling the fuel pump's operation.

2. What are common symptoms of code P0627 in a 2014 GMC Sierra?

Symptoms may include difficulty starting the engine, stalling, reduced fuel efficiency, or a complete lack of fuel delivery to the engine.

3. What causes code P0627 in a 2014 GMC Sierra?

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

4. How can I diagnose code P0627 in my 2014 GMC Sierra?

Start by checking the wiring and connectors in the fuel pump circuit for damage or corrosion. Use a multimeter to test for proper voltage and continuity, and inspect the fuel pump control module.

5. Can a faulty fuel pump trigger code P0627 in a 2014 GMC Sierra?

Yes, a failing or malfunctioning fuel pump can lead to this code if it cannot maintain proper operation or speed.

6. Is it safe to drive my 2014 GMC Sierra with code P0627?

Driving may be unsafe, as the vehicle could stall or fail to start due to inadequate fuel delivery. It's best to address the issue promptly.

7. How do I fix code P0627 on my 2014 GMC Sierra?

Repairs may involve replacing the fuel pump control module, repairing or replacing damaged wiring or connectors, or replacing the fuel pump if needed.

8. Can a bad fuel pump relay cause code P0627 in a 2014 GMC Sierra?

Yes, a faulty fuel pump relay can disrupt the circuit and trigger this code by preventing the fuel pump from operating correctly.

9. How much does it cost to repair code P0627 on a 2014 GMC Sierra?

Repair costs vary depending on the cause. Replacing a fuel pump control module may cost $150-$400, while a fuel pump replacement could cost $300-$1,000, including labor.

10. Can I clear code P0627 without fixing the issue on my 2014 GMC Sierra?

Clearing the code without addressing the underlying problem may result in the code returning, along with continued symptoms like stalling or starting issues.