AutoCodes – Mercedes-Benz – P0417 Mercedes-Benz

P0417 Mercedes-Benz Code - Secondary Air Injection System Switching Valve 'B' Circuit Shorted

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: P0417 Mercedes-Benz indicates Secondary Air Injection System Switching Valve 'B' Circuit Shorted.
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 3,794

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 P0417 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 P0417 Mercedes-Benz - Secondary Air Injection System Switching Valve 'B' Circuit Shorted - AutoCodes.com — P0417 Mercedes-Benz Code - Secondary Air Injection System Switching Valve 'B' Circuit Shorted

What does this mean?

What are the Possible Causes of the DTC P0417 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 P0417 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 P0417 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 P0417 Mercedes-Benz code?

Need more information on how to fix the P0417 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 P0417 Mercedes-Benz Code

1. What does the OBDII code P0417 mean on a Mercedes-Benz?

The code P0417 indicates a problem with the Secondary Air Injection System, specifically that the Switching Valve 'B' circuit has a short.

2. What are the common symptoms of the P0417 code in a Mercedes-Benz?

Common symptoms include a check engine light, failed emissions tests, reduced fuel efficiency, and a possible lack of power during cold starts.

3. What causes the P0417 code to appear in a Mercedes-Benz?

The most common causes are damaged wiring, a shorted or faulty switching valve, a malfunctioning air injection pump, or corroded electrical connections.

4. Can I drive my Mercedes-Benz with the P0417 code active?

While the vehicle may still be drivable, ignoring the P0417 code can lead to increased emissions and potential damage to other components in the secondary air injection system.

5. How do I diagnose the P0417 code on a Mercedes-Benz?

Diagnosing the P0417 code involves inspecting the wiring and connectors for the switching valve, testing the valve for proper function, and checking for proper voltage in the circuit.

6. How can I fix the P0417 code in my Mercedes-Benz?

Repairs may include replacing the faulty switching valve, repairing damaged wiring, cleaning corroded connectors, or replacing a malfunctioning air pump.

7. How much does it cost to repair the P0417 code on a Mercedes-Benz?

Repair costs can vary, but replacing the switching valve typically costs between $100 and $300, depending on labor rates and parts pricing.

8. What tools are needed to troubleshoot the P0417 code?

Youâ€™ll need an OBDII scanner, a multimeter to check electrical circuits, and basic hand tools to inspect and replace components.

9. Can a clogged air injection hose cause the P0417 code?

A clogged air injection hose is unlikely to cause a circuit short but may contribute to secondary air injection system issues, so itâ€™s worth inspecting.

10. Will clearing the P0417 code with an OBDII scanner fix the problem?

Clearing the code will turn off the check engine light temporarily, but the issue will return if the underlying problem is not resolved.