P2443 Fault Code

Secondary Air Injection System Switching Valve Stuck Closed Bank 2

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

The P2443 fault code indicates that the secondary air injection system switching valve for Bank 2 is stuck in a closed position. This system is designed to inject air into the exhaust stream to help reduce emissions during cold starts. When the valve is stuck closed, the system cannot function properly, leading to increased emissions and potentially affecting engine performance.

What are the symptoms of the P2443 code?

Vehicles experiencing this fault may exhibit:

• Illuminated Check Engine Light (CEL)
• Decreased engine performance
• Increased emissions during testing
• Possible rough idling or stalling issues
• Failed emissions test

What causes the P2443 code?

Common causes for this fault code include:

• Faulty secondary air injection system switching valve
• Blocked or damaged air injection system components
• Electrical issues such as damaged wiring or connectors
• Vacuum leaks affecting the system operation
• Carbon buildup in the valve preventing it from opening

How to fix P2443?

To resolve the P2443 fault code, consider the following steps:

• Inspect and replace the secondary air injection system switching valve if faulty.
• Check for and repair any damaged wiring or connectors related to the valve.
• Clean any carbon buildup from the valve and related components to ensure proper operation.
• Verify that there are no vacuum leaks affecting the air injection system.
• After repairs, clear the fault code and test drive the vehicle to ensure the issue is resolved.