OBD-II code · Powertrain (generic)
P0410 Secondary Air Injection System Malfunction
A general fault in the secondary air injection system. The system pumps fresh air into the exhaust during cold start to accelerate catalyst light-off; common faults are a seized pump, blocked passages or a stuck valve.
Is it safe to drive with P0410?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyAir pump seized (water ingress is a common cause)
- PossibleCombi valve stuck
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 1–5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Secondary Air Pump, Secondary Air Valve, Secondary Air Hose
Related codes
- P040DEGR Temperature Sensor A Circuit High
- P040EEGR Temperature Sensor A Circuit Intermittent/Erratic
- P040FEGR Temperature Sensor A/B Correlation
- P0411Secondary Air Injection System Incorrect Flow
- P0412Secondary Air Injection System Switching Valve A Circuit
- P0413Secondary Air Injection System Switching Valve A Circuit Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.