P0413 Fault Code

Secondary Air Injection System Switching Valve A Circuit Open

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

The P0413 code indicates that there is an issue with the Secondary Air Injection System. Specifically, it points to an open circuit in the Switching Valve A. This system is critical for reducing emissions during cold starts by injecting air into the exhaust stream.

What are the symptoms of the P0413 code?

When experiencing a P0413 code, a vehicle may exhibit the following symptoms:

• Dashboard warning light (Check Engine) illuminated.
• Increased emissions output.
• Possible rough idle or performance issues during cold starts.
• Failed emissions test due to elevated pollutants.

What causes the P0413 code?

Potential causes for this fault code can include:

• A malfunctioning Secondary Air Injection Switching Valve.
• Wiring issues such as frayed or broken wires in the circuit.
• Corroded electrical connectors that hinder proper communication.
• Failed relay associated with the secondary air system.
• Faulty engine control module (ECM) which fails to send the correct signals.

How to fix P0413?

To resolve the P0413 fault code, consider the following steps:

• Inspect and repair any damaged wiring or connectors related to the Secondary Air Injection System.
• Test the Secondary Air Injection Switching Valve for proper operation and replace if necessary.
• Check the related relay and replace it if it's faulty.
• Clear the code from the ECU and see if it returns, indicating persistent issues that may need further investigation.