AutoCodes – Audi – P0416 Audi

P0416 Audi Code - Secondary Air Injection System Switching Valve 'B' 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: P0416 Audi indicates Secondary Air Injection System Switching Valve 'B' 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 4,646

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 Apr 18, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0416 Audi 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 P0416 Audi - Secondary Air Injection System Switching Valve 'B' Circuit Open - AutoCodes.com — P0416 Audi Code - Secondary Air Injection System Switching Valve 'B' Circuit Open

What does this mean?

What are the Possible Causes of the DTC P0416 Audi?

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

How to Fix the DTC P0416 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 P0416 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 P0416 Audi Code

1. What are the common symptoms of OBDII code P0416 in an Audi related to the Secondary Air Injection System Switching Valve 'B' Circuit Open?

- Common symptoms include the check engine light coming on, rough idling, engine hesitation, and decreased fuel efficiency.

2. What are some possible causes of OBDII code P0416 in an Audi?

- Causes may include a faulty secondary air injection system switching valve, damaged wiring or connectors, a blown fuse, or a malfunctioning PCM (powertrain control module).

3. How can I diagnose the OBDII code P0416 in my Audi?

- Diagnosing the issue involves using an OBDII scanner to retrieve the code, inspecting the secondary air injection system components, checking the wiring and connectors for damage, and testing the switching valve for functionality.

4. Is it safe to continue driving with OBDII code P0416 in my Audi?

- It is generally not recommended to drive your Audi with this code present, as it can lead to further damage to the engine and emissions system over time.

5. How can I repair OBDII code P0416 in my Audi?

- Repair options may include replacing the secondary air injection system switching valve, repairing any damaged wiring or connectors, checking and replacing fuses if necessary, and resetting the fault code using an OBDII scanner.

6. Can a DIY enthusiast fix OBDII code P0416 in an Audi?

- Depending on your skills and knowledge, some DIY enthusiasts may be able to address this issue by following repair guides or tutorials. However, if you are unsure, it's best to consult a professional mechanic.

7. How much does it typically cost to repair OBDII code P0416 in an Audi at a repair shop?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $600 at a repair shop, including parts and labor.

8. What role does the Secondary Air Injection System Switching Valve 'B' play in an Audi's emissions system?

- The switching valve helps regulate the flow of air into the exhaust system to reduce emissions during cold starts and warm-up cycles.

9. Can extreme weather conditions affect the likelihood of OBDII code P0416 occurring in an Audi?

- Yes, extreme cold or hot weather conditions can potentially exacerbate issues with the secondary air injection system, leading to the triggering of code P0416.

10. How often should the secondary air injection system be inspected in an Audi to prevent OBDII code P0416 from occurring?

- It is recommended to have the system inspected as part of regular maintenance checks or whenever you notice any symptoms related to the secondary air injection system to prevent the occurrence of code P0416.