Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a system that helps reduce pollution when the engine starts. This code means a part of that system isn't opening like it should on one side of the engine.
The P2443 code indicates that the secondary air injection system's switching valve is stuck in the closed position on bank 2 of the engine.
The secondary air injection system is designed to reduce emissions by injecting air into the exhaust stream to help burn off excess fuel. The system uses a switching valve to control the flow of air. If this valve is stuck closed, it prevents the system from functioning properly, leading to increased emissions.
• Check Engine Light is on
• Failed emissions test
• Poor engine performance
• Faulty switching valve
• Blocked air injection system
• Faulty air pump
Secondary Air Injection System: A system that injects air into the exhaust stream to reduce emissions.
Switching Valve: A component that controls the flow of air in the secondary air injection system.
• Scan the vehicle for codes and freeze frame data.
• Inspect the air injection system for blockages.
• Test the switching valve for proper operation.
• Replace the faulty switching valve.
• Clear any blockages in the air injection system.
• Repair or replace the air pump if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Tundra
• Lexus GX470
• Toyota Sequoia
• Regularly inspect the air injection system.
• Replace air filters as recommended.
• Perform routine maintenance checks.
Emission Control System
• Have the vehicle inspected by a professional.
• Avoid driving the vehicle if it shows performance issues.
• Regularly maintain the vehicle to prevent recurrence.
Check with the vehicle manufacturer for specific warranty coverage related to emissions systems.
The P2443 code has been commonly reported in vehicles with secondary air injection systems, particularly in models with higher mileage.
Moderate – This issue should be addressed to avoid increased emissions and potential engine performance problems.
Driving with a malfunctioning emission system may not comply with local emissions regulations and can contribute to environmental pollution.
• Engine at operating temperature
• Idle conditions
The switching valve is typically located near the engine or exhaust system on bank 2.
Q: Can I drive with a P2443 code?
A: While the vehicle may still be drivable, it's best to address the issue to avoid increased emissions and potential engine problems.
Q: How can I prevent the P2443 code?
A: Regular maintenance and inspections of the air injection system can help prevent issues related to this code.
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