AutoCodes – Mercedes-Benz – P0415 Mercedes-Benz

P0415 Mercedes-Benz Code - Secondary Air Injection System Switching Valve 'B' Circuit Malfunction

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: P0415 Mercedes-Benz indicates Secondary Air Injection System Switching Valve 'B' Circuit Malfunction.
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 5,557

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 P0415 Mercedes-Benz 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 P0415 Mercedes-Benz - Secondary Air Injection System Switching Valve 'B' Circuit Malfunction - AutoCodes.com — P0415 Mercedes-Benz Code - Secondary Air Injection System Switching Valve 'B' Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0415 Mercedes-Benz?

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

How to Fix the DTC P0415 Mercedes-Benz?

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 P0415 Mercedes-Benz 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 P0415 Mercedes-Benz code?

Need more information on how to fix the P0415 Mercedes-Benz 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 P0415 Mercedes-Benz Code

1. What are common symptoms of OBDII code P0415 in a Mercedes-Benz?

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

2. What does the OBDII code P0415 indicate in a Mercedes-Benz?

- OBDII code P0415 indicates a malfunction in the Secondary Air Injection System Switching Valve 'B' circuit of the vehicle.

3. What are possible causes of the Secondary Air Injection System Switching Valve 'B' circuit malfunction in a Mercedes-Benz?

- Possible causes include a faulty secondary air injection pump, damaged wiring or connectors, a defective switching valve, or a blown fuse related to the system.

4. How can I diagnose the OBDII code P0415 in my Mercedes-Benz?

- Diagnosing OBDII code P0415 may involve conducting a visual inspection of the secondary air injection system components, checking the wiring and connectors for damage, and using a diagnostic scanner to pinpoint the exact issue.

5. Can I continue driving my Mercedes-Benz with OBDII code P0415?

- It is not recommended to drive your vehicle with OBDII code P0415 without addressing the issue promptly, as it can lead to poor engine performance and potential damage to other components.

6. How can I repair OBDII code P0415 in my Mercedes-Benz?

- Repairing OBDII code P0415 may involve replacing the faulty secondary air injection pump, repairing or replacing damaged wiring or connectors, or replacing the defective switching valve.

7. Are there any DIY tips for fixing OBDII code P0415 in a Mercedes-Benz?

- DIY tips may include checking for loose or corroded connections, inspecting the fuse related to the secondary air injection system, and ensuring proper installation of new components.

8. How much does it cost to repair OBDII code P0415 in a Mercedes-Benz at a dealership?

- The cost of repairing OBDII code P0415 at a dealership can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars.

9. Can a faulty secondary air injection system affect the emissions of my Mercedes-Benz?

- Yes, a malfunctioning secondary air injection system can lead to increased emissions from your Mercedes-Benz, potentially causing it to fail emissions tests.

10. How often does OBDII code P0415 occur in Mercedes-Benz vehicles?

- OBDII code P0415 is relatively common in Mercedes-Benz vehicles, especially in older models or those with high mileage. Regular maintenance and inspection of the secondary air injection system can help prevent this issue.