OBD-II FAULT CODE
P0416
Secondary Air Injection System Switching Valve B Circuit Open
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for P0416.
- Check Engine light
- Poor drivability or reduced fuel economy depending on fault
- Open circuit
- Disconnected connector
- Broken wire
- Failed component
- Scan all modules and record freeze-frame data before clearing codes
- Check battery voltage and related fuses
- Check connector fitment and continuity from module to component
- Repair open wire/connector or replace the failed component after continuity test
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.