OBD-II code · Powertrain (generic, extended)
P2448 AIR System High Air Flow Bank 1
The secondary air injection system on bank 1 delivers more flow than calibrated when the pump is commanded on - typically a stuck-open switching valve allowing free flow.
Is it safe to drive with P2448?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyAIR switching valve stuck open
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 1–3 h
- Emissions test
- Likely to fail
- Parts involved
- Air System Pump B1, Air System Switching Valve B1
Related codes
- P2449AIR System High Air Flow Bank 2
- P2445Secondary Air Injection System Pump Stuck On (Bank 1)
- P2446Secondary Air Injection Pump Stuck Off (Bank 2)
- P2447Secondary Air Injection Pump Stuck On (Bank 2)
- P244ADiesel Particulate Filter Differential Pressure Too Low
- P244BDiesel Particulate Filter Differential Pressure Sensor Offset
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.