DTC P2279: Intake Air System Leak Detected (2004-2005 models)

NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

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