DTC P2279: Intake Air System Leak Detected
- Turn the ignition switch to ON (II)
- Check for Temporary DTCs or DTCs with the HDS
Are DTC P2279 and DTC P0101 or P1129 indicated at the same time?
YES -Troubleshoot DTC P0101 or P1129
NO -Go to step 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 part(s), then go to step 14
NO -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 -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
- 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, the 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
- Do the PCS ON/OFF in the INSPECTION MENU with the HDS
- 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 (see EVAP CANISTER VENT SHUT VALVE REPLACEMENT ), then go to step 14
- Do the PCV valve test (see
PCV VALVE INSPECTION )
Is the test OK?
YES -Go to step 10
NO -Replace the PCV valve (see PCV VALVE INSPECTION ), then go to step 14
- Remove the air cleaner (see AIR CLEANER REMOVAL/INSTALLATION )
- Check for cracks or other damage at the air cleaner
Is the air cleaner OK?
YES -Go to step 12
NO -Replace the air cleaner (see AIR CLEANER REMOVAL/INSTALLATION ), then go to step 4
- Remove the air cleaner element
- Check for damage to the air cleaner element
Is the air cleaner element OK?
YES -Check the camshaft timing (see step 2 on VALVE CLEARANCE ADJUSTMENT ), then go to step 14
NO -Replace the air cleaner element (see AIR CLEANER REMOVAL/INSTALLATION ), then go to step 14
- Reset the PCM with the HDS
- Do the PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE )
- Start the engine Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in 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 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
- 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