AutoCodes – Audi – P0629 Audi

P0629 Audi Code - Fuel Pump 'A' Control Circuit High

Quick Answer

The Engine Control Module (ECM) monitors the Fuel Pump Control Circuit. Common causes include Faulty fuel pump relay, Faulty fuel pump, Fuel pump harness is open or shorted. 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 Audi indicates Fuel Pump 'A' Control Circuit High.
Common causes: Common causes include Faulty fuel pump relay, Faulty fuel pump, Fuel pump harness is open or shorted.
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 2,801

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 May 01, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0629 Audi Description

The Engine Control Module (ECM) monitors the Fuel Pump Control Circuit. The ECM sets the OBDII code when the Fuel Pump Control Circuit is out of factory specifications.

OBDII Code P0629 Audi - Fuel Pump 'A' Control Circuit High - AutoCodes.com — P0629 Audi Code - Fuel Pump 'A' Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P0629 Audi?

Faulty fuel pump relay
Faulty fuel pump
Fuel pump harness is open or shorted
Fuel pump circuit poor electrical connection
Faulty fuel pump control module (if applicable)

How to Fix the DTC P0629 Audi?

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 P0629 Audi 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 P0629 Audi code?

Need more information on how to fix the P0629 Audi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0629 Audi 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 P0629 Audi Code

1. What are the common symptoms of OBDII code P0629 in an Audi related to the Fuel Pump 'A' Control Circuit High?

- Common symptoms include hard starting, engine stalling, rough idling, and a noticeable decrease in fuel efficiency.

2. What are the potential causes of the OBDII code P0629 in an Audi?

- The code P0629 can be triggered by issues such as a faulty fuel pump relay, damaged wiring or connectors in the fuel pump circuit, or a malfunctioning fuel pump control module.

3. How can I diagnose the Fuel Pump 'A' Control Circuit High issue in my Audi?

- Proper diagnosis involves using an OBDII scanner to read the code, checking the fuel pump relay, inspecting the wiring and connectors for any damages, and testing the fuel pump control module.

4. What should I do if my Audi displays the OBDII code P0629 related to the fuel pump control circuit?

- It is recommended to address the issue promptly by inspecting and repairing any damaged wiring or connectors, testing and potentially replacing the fuel pump relay, and checking the fuel pump control module for faults.

5. Can I continue driving my Audi with the OBDII code P0629 indicating a Fuel Pump 'A' Control Circuit High problem?

- It is not advisable to drive the vehicle with this issue as it can lead to potential fuel delivery problems, engine performance issues, and further damage to the fuel system components.

6. How much does it typically cost to repair the Fuel Pump 'A' Control Circuit High issue in an Audi?

- The cost of repair can vary depending on the specific cause of the problem, but it may involve expenses for parts such as a fuel pump relay or fuel pump control module, as well as labor costs for diagnosis and repair.

7. Are there any preventative measures to avoid the OBDII code P0629 related to the fuel pump control circuit in an Audi?

- Regular maintenance, including checking the fuel system components and electrical connections, can help prevent issues leading to the P0629 code. Additionally, addressing any fuel system problems promptly can help avoid costly repairs in the future.

8. Is it possible to reset the OBDII code P0629 in an Audi without addressing the underlying issue?

- While clearing the code may temporarily turn off the check engine light, it is crucial to address the root cause of the problem to prevent further issues and ensure proper vehicle operation.

9. Can a DIY enthusiast troubleshoot and repair the OBDII code P0629 related to the fuel pump control circuit in an Audi?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair simple issues like checking and replacing a fuel pump relay. However, more complex problems may require professional assistance.

10. How long does it take to repair the Fuel Pump 'A' Control Circuit High issue in an Audi?

- The repair time can vary based on the specific cause of the problem and the extent of the needed repairs. Simple fixes like replacing a fuel pump relay may take less time, while diagnosing and resolving wiring issues or control module faults can be more time-consuming.