P0417 Fault Code

Secondary Air Injection System Switching Valve B Circuit Shorted

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0417 fault code indicates a problem with the Secondary Air Injection System, specifically that there is a short circuit in the B circuit of the switching valve. The Secondary Air Injection System is designed to reduce emissions by injecting air into the exhaust system during cold starts, helping the catalytic converter reach optimal operating temperatures more quickly.

What are the symptoms of the P0417 code?

When the P0417 code is present, you may experience:

• Check Engine Light (CEL) illuminated on the dashboard.
• Increased emissions during tests (potentially failing an emissions test).
• Poor engine performance, such as rough idling or decreased power.
• Reduced fuel economy due to inefficient combustion.

What causes the P0417 code?

The most common causes of this code include:

• Electrical short in the wiring or connectors of the Secondary Air Injection System.
• Faulty Secondary Air Injection Switching Valve.
• Damaged or worn out vacuum hoses connected to the system.
• Malfunctioning relay or fuse associated with the air injection.

How to fix P0417?

To resolve the P0417 fault code, follow these steps:

1. Inspect the wiring and connectors related to the Secondary Air Injection System for signs of damage or corrosion.
2. Test the Secondary Air Injection Switching Valve to ensure it operates correctly.
3. Check for any vacuum leaks in the hoses that could affect system performance.
4. Replace any faulty components or repair wiring as necessary.
5. Clear the fault codes from the vehicle’s computer and test drive to see if the code returns.