P0416
Secondary Air Injection System Switching Valve B Circuit Open
Secondary Air Injection System Switching Valve B Circuit Open: the circuit is open. Likely a broken wire, disconnected connector, or failed component.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Open winding or wireCommon
- Pin pushed back out of connector bodyLess likely
- Cracked solder joint inside the module or sensorLess likely
Parts involved
- Secondary Air Injection Valve
P0416 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.