OBD-II Code · Emissions
P2440
Secondary Air Injection Valve Stuck Open (Bank 1)
low severitySafe to drive$200-$600
SAI valve stuck open on bank 1.
Common symptoms
- CEL
- Failed emissions
Likely causes
- Stuck valve
- Moisture damage
Where to start
- Try the cheapest cause first. Start by checking: stuck valve.
- Cost & scope. $200-$600
- If the code returns after the fix: escalate to a shop or scanner with live-data and freeze-frame. A code that re-sets means the underlying fault is still there.
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