OBD-II Code · Fuel & Air
P2279
Intake Air System Leak
medium severitySafe to drive$50-$300
Unmetered air entering after MAF.
Common symptoms
- Rough idle
- Lean codes
- CEL
Likely causes
- Cracked intake boot
- Loose clamp
- PCV hose
Where to start
- Try the cheapest cause first. Start by checking: cracked intake boot.
- Cost & scope. $50-$300
- 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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