DTC P2279: Intake Air System Leak
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ).
- If DTC P0443 is stored at the same time as DTC P2279, troubleshoot DTC P0443 first, then recheck for DTC P2279.
- Check for vacuum leaks at these parts:
- PCV valve
- PCV hose
- Purge (PCS) line
- Throttle body
- Intake manifold
- Brake booster hose
Are the parts OK?
YES - Go to step 2.
NO - Repair or replace the damaged parts, then go to step 4.
- Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on, then let it idle 1 minute.
- Monitor the OBD STATUS for DTC P2279 in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES - Check the camshaft timing, J35A9 engine (see TIMING BELT INSPECTION ), J35Z1 engine (see TIMING BELT REMOVAL ), then go to step 4.
NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. If the screen indicates NOT COMPLETED, go to step 2 and recheck.
- Reset the PCM with the HDS.
- Do the PCM IDLE LEARN PROCEDURE (see ).
- Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on, then let it idle 1 minute.
- Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P2279 is indicated, check for vacuum leaks at the PCV valve, the PCV hose, the EVAP canister purge line, the throttle body, the intake manifold, and the brake booster hose, then go to step 1.
NO - Go to step 8.
- Monitor the OBD STATUS for DTC P2279 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC'S TROUBLESHOOTING .
NO - If the screen indicates FAILED, go to step 1 and recheck. If the screen indicates NOT COMPLETED, keep idling until a result comes on.