AutoCodes – Volkswagen – P0629 Volkswagen

P0629 Volkswagen 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 Volkswagen 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 4,682

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 Jan 23, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0629 Volkswagen 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 Volkswagen - Fuel Pump 'A' Control Circuit High - AutoCodes.com — P0629 Volkswagen Code - Fuel Pump 'A' Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P0629 Volkswagen?

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 Volkswagen?

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 Volkswagen 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 Volkswagen code?

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

Need Help with the Code?

Get the P0629 Volkswagen 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 Volkswagen Code

1. What are common symptoms of OBDII code P0629 in a Volkswagen related to the fuel pump 'A' control circuit high?

- Common symptoms include difficulty starting the vehicle, engine stalling, and the fuel pump continuously running.

2. What are the potential causes of OBDII code P0629 in a Volkswagen?

- The code P0629 in a Volkswagen is typically caused by a faulty fuel pump relay, a damaged fuel pump control module, or wiring issues in the fuel pump circuit.

3. How can I diagnose the OBDII code P0629 in my Volkswagen related to the fuel pump control circuit high?

- To diagnose the issue, you can use a diagnostic scanner to read the fault codes, check the fuel pump relay and control module for proper functioning, and inspect the wiring for any signs of damage.

4. Can I still drive my Volkswagen with OBDII code P0629 related to the fuel pump 'A' control circuit high?

- It is not recommended to drive your Volkswagen with this code as it can lead to engine stalling or other fuel delivery issues, potentially leaving you stranded.

5. How can I repair OBDII code P0629 in my Volkswagen?

- The repair process typically involves replacing the faulty fuel pump relay, repairing or replacing damaged wiring, or replacing the fuel pump control module if necessary.

6. Is it safe to reset the OBDII code P0629 in my Volkswagen without addressing the underlying issue?

- Resetting the code without fixing the root cause may temporarily clear the warning light, but the issue will likely reoccur, leading to potential safety risks and vehicle performance problems.

7. Can a DIY enthusiast fix OBDII code P0629 related to the fuel pump control circuit high in a Volkswagen?

- Depending on your experience and access to tools, DIY enthusiasts may be able to diagnose and repair this code by following proper procedures, such as checking relays, modules, and wiring.

8. How much does it cost to repair OBDII code P0629 in a Volkswagen at a dealership or repair shop?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500 or more, including parts and labor.

9. Are there any preventive measures to avoid OBDII code P0629 in a Volkswagen related to the fuel pump 'A' control circuit high?

- Regularly inspecting and maintaining the fuel pump system, such as checking for wiring issues and replacing components before they fail, can help prevent this code from occurring.

10. Will fixing OBDII code P0629 improve the fuel efficiency and performance of my Volkswagen?

- Yes, resolving the fuel pump control circuit high issue can help restore optimal fuel delivery, leading to improved fuel efficiency and better overall performance of your Volkswagen.