AutoCodes – Generic – P0416

P0416 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 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 20,954

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 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 - Secondary Air Injection System Switching Valve 'B' Circuit Open - AutoCodes.com — P0416 Code - Secondary Air Injection System Switching Valve 'B' Circuit Open

What does this mean?

What are the Possible Causes of the DTC P0416?

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?

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 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 P0416 code?

Need more information on how to fix the P0416 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0416 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0416 Audi — Secondary Air Injection System Switching Valve 'B' Circuit Open
P0416 Mercedes-Benz — Secondary Air Injection System Switching Valve 'B' Circuit Open
P0416 Subaru — Secondary Air Injection System Switching Valve 'B' Circuit Open
P0416 Volkswagen — Secondary Air Injection System Switching Valve 'B' Circuit Open

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 Code

1. What are the common symptoms of OBDII code P0416?

- The common symptoms of code P0416 include the Check Engine Light illuminating on the dashboard, rough idling, decreased engine performance, and potential increase in emissions.

2. What does the OBDII code P0416 mean?

- OBDII code P0416 indicates a problem with the Secondary Air Injection System Switching Valve 'B' Circuit being open, leading to potential issues with the secondary air injection system.

3. What are the possible causes of OBDII code P0416?

- The possible causes of code P0416 include a faulty secondary air injection system switching valve, damaged wiring or connectors in the circuit, a blown fuse related to the system, or a malfunctioning PCM (Powertrain Control Module).

4. How can I diagnose the OBDII code P0416?

- Diagnosing code P0416 involves using an OBDII scanner to retrieve the code, visually inspecting the secondary air injection system components, checking the wiring and connectors for any damage, and testing the switching valve for proper functionality.

5. Can I still drive my vehicle with OBDII code P0416?

- It is generally not recommended to drive your vehicle with OBDII code P0416 present, as it can lead to decreased engine performance and potential damage to other components. It is best to address the issue promptly.

6. How serious is OBDII code P0416?

- While code P0416 may not cause immediate drivability issues, it is still a serious problem that can affect emissions and overall engine performance if left unresolved. It is important to address the issue to maintain the proper functioning of the vehicle.

7. How can I repair OBDII code P0416?

- Repairing code P0416 may involve replacing the faulty secondary air injection system switching valve, repairing any damaged wiring or connectors, checking and replacing blown fuses if necessary, or reprogramming the PCM if it is found to be faulty.

8. Can I reset the Check Engine Light associated with OBDII code P0416?

- Resetting the Check Engine Light after addressing the underlying issue causing code P0416 can be done using an OBDII scanner. However, it is important to ensure that the root cause of the problem has been fixed to prevent the light from coming back on.

9. Is it possible to prevent OBDII code P0416 from occurring?

- While some causes of code P0416 may be unavoidable, regular maintenance of the secondary air injection system, checking for any signs of wear or damage, and addressing any issues promptly can help prevent code P0416 from occurring.

10. How much does it typically cost to repair OBDII code P0416?

- The cost of repairing code P0416 can vary depending on the specific cause of the issue, the cost of parts needed for repair, and labor charges. On average, the repair cost for code P0416 can range from $100 to $500, but it is recommended to get a professional diagnosis for an accurate estimate.