OBD-II code · Powertrain (generic)
P0412 Secondary Air Injection System Switching Valve A Circuit
Secondary Air Injection System Switching Valve A Circuit: an electrical fault is present in the circuit.
Is it safe to drive with P0412?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySolenoid winding open or shorted
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
- P0415Secondary Air Injection System Switching Valve B Circuit
- P040FEGR Temperature Sensor A/B Correlation
- P0410Secondary Air Injection System Malfunction
- P0411Secondary Air Injection System Incorrect Flow
- P0413Secondary Air Injection System Switching Valve A Circuit Open
- P0414Secondary Air Injection System Switching Valve "A" Circuit Shorted
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.