P2443 OBD-II: Secondary Air Injection System Switching Valve Stuck Closed
P2443 Severity
Will P2443 go away on its own?
Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.
For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.
Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.
What causes OBD-II fault code P2443?
The Secondary Air Injection System pumps outside fresh air into the Exhaust System during cold engine start up. This additional air helps burn up the highly rich exhaust emissions that are produced when the engine is warming up. The Secondary Air System typically has an Air Pump and some tubes or plumbing to route the air. The system also has a solenoid and Check Valve(s) to control the airflow. When the engine control module (PCM) detects a faulty with the Secondary Air Injection System, it will set code P2443.
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OBD II Fault Code
- OBD II P2443
OBD-II Code Powertrain Control Module (PCM) failure is defined as a Secondary Air Injection System Switching Valve Stuck Closed
The Secondary Air Injection System pumps outside fresh air into the Exhaust System during cold engine start up. This additional air helps burn up the highly rich exhaust emissions that are produced when the engine is warming up. The Secondary Air System typically has an Air Pump and some tubes or plumbing to route the air. The system also has a solenoid and Check Valve(s) to control the airflow. When the engine control module (PCM) detects a faulty with the Secondary Air Injection System, it will set code P2443.
Common Problems That Trigger the P2443 Code
- Clogged or disconnected vacuum hose
- Powertrain Control Module (PCM) failure
- Secondary air pump control valve failure
- Secondary air pump failure
- Wiring issue
Ask our experts about P2443.
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