P2279
DTC P2279: Intake Air System LeakNOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs with the HDS.
Are DTC P2279 and DTC P0101, or P1128, or P1129 indicated at the same time7
YES - Go to the indicated DTC's troubleshooting.
NO - Go to step 3.
3. Check for vacuum leaks at these parts:
- PCV valve
- PCV hose
- Purge (PCS) line
- Throttle body
- Intake manifold � Brake booster hose
- Brake booster
Are there any leaks?
YES - Repair or replace the damaged parts), then go to step 14.
NO - Go to step 4.
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 for 1 minute.
5. Monitor the OBD STATUS for DTC P2279 in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES - Go to step 7.
NO - If the screen indicates PASSED, go to step 6. If the screen indicates NOT COMPLETED, go to step 4 and recheck.
6. Monitor the OBD STATUS for DTC P0507 in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES - Go to step 7.
NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. If the screen indicates EXECUTING, let the engine idle until a result comes on. If the screen indicates OUT OF CONDITION, go to step 4 and recheck.
7. Do the PCS ON/OFF in the INSPECTION MENU with the HDS.
8. Listen for a clicking sound at the EVAP canister purge valve.
Does the valve click?
YES - Go to step 9.
NO - Replace the EVAP canister purge valve, then go to step 14.
9. Test the PCV valve.
Is the test OK?
YES - Go to step 10.
NO - Replace the PCV valve, then go to step 14.
10. Remove the air cleaner.
11. Check the air cleaner for damage.
Is the air cleaner OK?
YES - Go to step 12.
NO - Replace the air cleaner, then go to step 4.
12. Remove the air cleaner element.
13. Check for damage at the air cleaner element.
Is the air cleaner element OK?
YES - Check the camshaft timing, then go to step 14.
NO - Replace the air cleaner element, then go to step 14.
14. Reset the PCM with the HDS.
15. Do the PCM idle learn procedure. Programming and Relearning
16. 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 for 1 minute.
17. 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 purge (PCS) line, the throttle body, or the brake booster hose, the intake manifold, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Go to step 18.
18. Monitor the OBD STATUS for DTC P2279 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete.
NO - If the screen indicates FAILED, go to step 1 and recheck. If the screen indicates NOT COMPLETED, go to step 16 and recheck.