DTC P2279: Intake Air System Leak Detected (2004 model)

Reset the ECM/PCM (see ECM/PCM RESET (2002-2004 MODELS) ).
Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on.
Let the engine idle for at least 40 seconds with the throttle fully closed.
Check for Temporary DTCs or DTCs with a scan tool or the HDS.
Is DTC P2279 indicated?
1. YES - Check for vacuum leaks at these parts:
  - PCV valve
  - PCV hose
  - EVAP canister purge valve
  - Throttle body
  - Intake manifold
  - Brake booster hose
  - Intake air bypass control thermal valve
2. NO - Intermittent failure, system is OK at this time.