The engine computer has detected an open circuit in the secondary air injection switching valve. This indicates that the electrical path to the valve is broken, preventing the system from directing air into the exhaust to warm up the catalytic converter during cold starts.
The internal coil of the solenoid has failed or broken, creating an open circuit.
Wires leading to the switching valve are frayed, broken, or chewed by rodents.
Moisture and debris have caused corrosion in the electrical pins, breaking the circuit connection.
The connector is not fully seated or the locking tab has failed, causing a pin to lose contact.
The internal driver circuit within the engine control module has failed.
Generally no; P0413 is an emissions-related circuit fault and typically does not affect engine performance or drivability.
No, this code refers specifically to the electrical circuit of the air switching valve, not the physical state of the catalyst.
No; it is highly uncommon for P0413 to be caused by the PCM. The failure is almost always located in the solenoid itself or the wiring connecting it to the computer.