AutoCodes – Volkswagen – P0413 Volkswagen

P0413 Volkswagen Code - Secondary Air Injection System Switching Valve 'A' Circuit Open

Quick Answer

An air pump is used on the vehicle to lower tail pipe emissions on start-up. Common causes include Faulty Air Pump inoperative, Air bypass solenoid harness is open or shorted, Air bypass solenoid circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0413 Volkswagen indicates Secondary Air Injection System Switching Valve 'A' Circuit Open.
Common causes: Common causes include Faulty Air Pump inoperative, Air bypass solenoid harness is open or shorted, Air bypass solenoid circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 26,079

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0413 Volkswagen Description

An air pump is used on the vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module (PCM) grounds the Air pump relay control circuit which energizes the Air pump. The PCM also grounds the Air combination valve vacuum control solenoid circuit, which energizes the Air vacuum control solenoid. Vacuum is then applied to both Air combination valve diaphragms which opens the shut off valves. The PCM enables both circuits simultaneously when Air system operations id desired. When the AIR system is active, then Air pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR combination valves replace the conventional check valves. When the AIR system is inactive the shut off valves prevent air flow in either direction.

OBDII Code P0413 Volkswagen - Secondary Air Injection System Switching Valve 'A' Circuit Open - AutoCodes.com — P0413 Volkswagen Code - Secondary Air Injection System Switching Valve 'A' Circuit Open

What does this mean?

What are the Possible Causes of the DTC P0413 Volkswagen?

Faulty Air Pump inoperative
Air bypass solenoid harness is open or shorted
Air bypass solenoid circuit poor electrical connection

How to Fix the DTC P0413 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 P0413 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.

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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 P0413 Volkswagen Code

What does the OBDII code P0413 mean for a Volkswagen?

Code P0413 indicates an issue with the Secondary Air Injection System Switching Valve 'A' circuit, specifically that it is open or not functioning properly.

What are the common symptoms of P0413 in a Volkswagen?

Symptoms include an illuminated check engine light, possible rough engine startup, reduced fuel efficiency, and failed emissions tests.

What causes the P0413 code to appear in a Volkswagen?

Common causes include a faulty switching valve, damaged wiring or connectors, a blown fuse, or issues with the secondary air injection pump.

Can P0413 cause engine damage in a Volkswagen?

While P0413 does not directly cause engine damage, prolonged driving with this issue can lead to increased emissions and potential harm to the catalytic converter.

How do you diagnose the P0413 code in a Volkswagen?

Diagnosis involves inspecting the wiring and connectors for damage, testing the switching valve for continuity, and checking the air pump and related components.

Can a faulty fuse trigger the P0413 code in a Volkswagen?

Yes, a blown fuse in the secondary air injection system can cause the switching valve circuit to become open, triggering the P0413 code.

What is the Secondary Air Injection System Switching Valve?

The switching valve controls airflow from the secondary air injection pump to the exhaust system, helping reduce emissions during cold starts.

How much does it cost to fix the P0413 code in a Volkswagen?

Repair costs vary but typically range from $100 to $400, depending on whether the issue is a wiring repair, switching valve replacement, or air pump repair.

Can I drive my Volkswagen with the P0413 code?

While the car may still be drivable, it is recommended to address the issue promptly to avoid increased emissions and potential damage to other components.

How can I prevent the P0413 code in my Volkswagen?

Regular maintenance, inspecting wiring and connectors, and keeping the secondary air injection system clean can help prevent this issue.