P0415 Fault Code

Secondary Air Injection System Switching Valve B Circuit Malfunction

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

The P0415 fault code indicates a malfunction in the Secondary Air Injection System Switching Valve B circuit. This system is responsible for injecting air into the exhaust stream to help reduce emissions during engine startup and operation. A fault in this circuit can lead to increased emissions and poor engine performance.

What are the symptoms of the P0415 code?

Drivers may experience a variety of symptoms when the P0415 code is triggered, such as:

• Check Engine Light activated on the dashboard
• Rough idling or stalling of the engine
• Decrease in fuel efficiency
• Failed emissions test due to elevated emissions levels

What causes the P0415 code?

Several factors may lead to the P0415 error code including:

• Faulty Secondary Air Injection Valve B
• Damaged wiring or poor connections in the valve circuit
• Issues with the engine control module (ECM)
• Blockages in the air injection system
• Failed vacuum hoses in the air injection system

How to fix P0415?

To resolve the P0415 code, consider following these steps:

• Inspect and test the Secondary Air Injection Valve B for functionality and replace if defective.
• Check wiring and connectors for damage or corrosion, and repair as necessary.
• Inspect the entire air injection system for blockages or leaks.
• Ensure the vacuum lines are intact and functioning properly.
• Clear the error code after repairs and perform a test drive to verify the fix.