DTC P2279

DTC P2279  : Intake Air System Leak

DTC (PGM-FI)

1. Intake air system visual check:

   Check for vacuum leaks at these parts:

   • PCV valve
   • PCV hose
   • Purge (PCS) line
   • Throttle body
   • Intake manifold

   Are the parts OK?

   YES 

   Go to step 2.

   NO 

   Repair or replace any leaking part(s).

2. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LICK) mode.

   -4. Enter the maintenance mode, then start the engine .

   -5. Hold the engine speed at 3000 RPM without load (in P or N) until the radiator fan comes on, then let it idle for 10 seconds.

   -6. Monitor the OBD STATUS for DTC P2279 with the HDS.

   DTC Description	OBD Status
   P2279 Intake Air System Leak

   OBD Status

   Does the HDS indicate FAILED?

   YES 

   The failure is duplicated. Check the camshaft timing and adjust it if needed . If the cam timing is OK, check the valve clearance adjustment and set to specification .

   NO 

   If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for vacuum leaks at the PCV valve, the PCV hose, the purge (PCS) line, the throttle body, and the intake manifold. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot . If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 2-1 and recheck.