AutoCodes – Audi – P1429 Audi

P1429 Audi Code - Brake System Vacuum Pump Activation Open Circuit

Quick Answer

P1429 Audi indicates Brake System Vacuum Pump Activation Open Circuit. Common causes include Faulty Brake System Vacuum Pump, Brake System Vacuum Pump harness is open or shorted, Brake System Vacuum Pump 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: P1429 Audi indicates Brake System Vacuum Pump Activation Open Circuit.
Common causes: Common causes include Faulty Brake System Vacuum Pump, Brake System Vacuum Pump harness is open or shorted, Brake System Vacuum Pump 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 16,032

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 Aug 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1429 Audi Description

OBDII Code P1429 Audi - Brake System Vacuum Pump Activation Open Circuit - AutoCodes.com — P1429 Audi Code - Brake System Vacuum Pump Activation Open Circuit

What does this mean?

What are the Possible Causes of the DTC P1429 Audi?

Faulty Brake System Vacuum Pump
Brake System Vacuum Pump harness is open or shorted
Brake System Vacuum Pump circuit poor electrical connection

How to Fix the DTC P1429 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 P1429 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 P1429 Audi code?

Need more information on how to fix the P1429 Audi 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 P1429 Audi Code

1. What are common symptoms of OBDII code P1429 in an Audi related to the brake system vacuum pump activation open circuit?

The common symptoms include illuminated check engine light, reduced brake assist functionality, and potential loss of power brakes.

2. What are the possible causes of OBDII code P1429 in an Audi indicating an open circuit in the brake system vacuum pump activation?

Potential causes include a faulty vacuum pump, damaged wiring or connectors in the vacuum pump circuit, or a malfunctioning brake system vacuum sensor.

3. How can I diagnose the cause of OBDII code P1429 in my Audi?

Diagnosis involves using a scan tool to retrieve the specific fault code, inspecting the vacuum pump and related components for any visible damage, and testing the wiring and connectors for continuity and proper voltage.

4. Can I continue driving my Audi with OBDII code P1429 related to the brake system vacuum pump activation open circuit?

It is not recommended to drive the vehicle with this fault code as it may compromise the effectiveness of the brake system. Immediate attention and repair are advised.

5. What are some repair tips for resolving OBDII code P1429 in an Audi?

Repair tips include checking and replacing the vacuum pump if necessary, repairing or replacing damaged wiring or connectors, and ensuring proper connection and functionality of the brake system vacuum sensor.

6. Is it possible to reset the OBDII code P1429 in an Audi without fixing the underlying issue?

While you can clear the fault code with a scan tool, it is not advisable to do so without addressing the root cause, as the issue may persist and potentially lead to further problems.

7. How much does it typically cost to repair OBDII code P1429 related to the brake system vacuum pump activation open circuit in an Audi?

The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1429 in an Audi themselves?

Depending on the cause of the fault, some DIY enthusiasts may be able to address the issue by replacing components like the vacuum pump or repairing wiring. However, professional diagnosis and repair are recommended for complex issues.

9. Are there any preventive measures to avoid OBDII code P1429 in an Audi related to the brake system vacuum pump activation open circuit?

Regular maintenance and inspections of the brake system, including the vacuum pump and related components, can help prevent issues that may trigger this fault code.

10. Will OBDII code P1429 in an Audi cause any long-term damage if left unrepaired?

Continued driving with this fault code unresolved may lead to further damage to the brake system components and compromise overall safety. It is important to address the issue promptly to prevent potential long-term damage.