AutoCodes – Audi – P1420 Audi

P1420 Audi Code - Secondary Air Injection Control Module Electrical Malfunction

Quick Answer

P1420 Audi indicates Secondary Air Injection Control Module Electrical Malfunction. Common causes include Faulty AIR Solenoid Valve, AIR Solenoid Valve harness is open or shorted, AIR Solenoid Valve 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: P1420 Audi indicates Secondary Air Injection Control Module Electrical Malfunction.
Common causes: Common causes include Faulty AIR Solenoid Valve, AIR Solenoid Valve harness is open or shorted, AIR Solenoid Valve 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 4,061

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P1420 Audi Description

OBDII Code P1420 Audi - Secondary Air Injection Control Module Electrical Malfunction - AutoCodes.com — P1420 Audi Code - Secondary Air Injection Control Module Electrical Malfunction

What does this mean?

What are the Possible Causes of the DTC P1420 Audi?

Faulty AIR Solenoid Valve
AIR Solenoid Valve harness is open or shorted
AIR Solenoid Valve circuit poor electrical connection

How to Fix the DTC P1420 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 P1420 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.

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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 P1420 Audi Code

1. What does the OBDII code P1420 mean on an Audi?

P1420 indicates an electrical malfunction in the Secondary Air Injection Control Module, which manages the air pump system used to reduce emissions during cold starts.

2. What are common symptoms of the P1420 code in an Audi?

Symptoms may include an illuminated check engine light, failed emissions tests, rough cold starts, or unusual noises from the secondary air injection system.

3. What causes the P1420 code in an Audi?

Common causes include a faulty secondary air injection control module, corroded or damaged wiring, a blown fuse, or issues with the air pump itself.

4. Can I drive my Audi with the P1420 code?

While the vehicle may still be drivable, ignoring the issue can lead to increased emissions and potential damage to other components in the secondary air injection system.

5. How is the P1420 code diagnosed in an Audi?

A technician will typically inspect the secondary air injection system, check the control module, test electrical connections, and verify the functionality of the air pump.

6. How do I fix the P1420 code on my Audi?

Repairs may involve replacing the secondary air injection control module, repairing damaged wiring, replacing fuses, or addressing faults in the air pump system.

7. What tools are needed to troubleshoot the P1420 code?

A diagnostic scanner, a multimeter for testing electrical connections, and basic tools for inspecting and replacing components are commonly used.

8. What is the cost to repair the P1420 code on an Audi?

Repair costs vary depending on the issue, ranging from $100 for wiring repairs or fuse replacement to $500 or more if the control module or air pump needs replacement.

9. Can a dirty air filter cause the P1420 code?

No, a dirty air filter is not directly related to the secondary air injection system and is unlikely to trigger this specific code.

10. How can I prevent the P1420 code from recurring?

Regular maintenance, ensuring electrical connections are clean and secure, and addressing any secondary air injection system issues promptly can help prevent this code.