OBD-II code · Powertrain (generic)
P0419 Secondary Air Injection System Control B Circuit
A general electrical fault on AIR system control circuit B (typically the AIR pump driver line on the second pump or relay).
Is it safe to drive with P0419?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyPump driver or relay fault
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 Pump
Related codes
- P0416Secondary Air Injection System Switching Valve B Circuit Open
- P0417Secondary Air Injection System Switching Valve B Circuit Shorted
- P0418Secondary Air Injection System Relay "A" Circuit Malfunction
- P041AEGR Temperature Sensor B Circuit
- P041BEGR Temperature Sensor B Circuit Range/Performance
- P041CEGR Temperature Sensor B Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.