P2446 Fault Code

Secondary Air Injection System Pump Stuck On Bank 2

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

The P2446 fault code indicates a problem with the secondary air injection system, specifically that the pump for Bank 2 is stuck in the 'on' position. The secondary air injection system is designed to reduce emissions by introducing air into the exhaust stream during cold starts, helping to burn off excess fuel.

What are the symptoms of the P2446 code?

Common symptoms associated with the P2446 code include:

• Increased emissions during vehicle operation.
• Illuminated Check Engine Light (CEL) on the dashboard.
• Reduced engine performance in some cases, particularly during startup.
• Potential increased fuel consumption.

What causes the P2446 code?

Several issues could cause the P2446 fault code, including:

• A malfunctioning secondary air injection pump that is unable to turn off.
• A failed relay or fuse that keeps the pump energized.
• Blocked or damaged hoses that prevent proper operation.
• Faulty control circuit or wiring that provides incorrect signals to the pump.

How to fix P2446?

To resolve the P2446 fault code, follow these steps:

• Inspect the secondary air injection pump and its wiring for damage or disconnection.
• Test the pump operation to ensure it can be turned off properly.
• Check the relay and fuse associated with the secondary air system.
• Replace any defective components and clear the fault code using an OBD-II scanner.
• After repairs, test drive the vehicle to confirm that the problem is resolved and the Check Engine Light does not reappear.