OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P0416?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen winding or wire
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Secondary Air Injection Valve
Related codes
- P0413Secondary Air Injection System Switching Valve A Circuit Open
- P0415Secondary Air Injection System Switching Valve B Circuit
- P0414Secondary Air Injection System Switching Valve "A" Circuit Shorted
- P0417Secondary Air Injection System Switching Valve B Circuit Shorted
- P0418Secondary Air Injection System Relay "A" Circuit Malfunction
- P0419Secondary Air Injection System Control B Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.