Identifying PCV System Component Location. Scheme 827
DTC P2279: Intake Air System Leak
Note. 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 Brake booster hose Are the parts OK? YES -Go to step 2. NO -Repair or replace any damaged part(s), then Go to step 4 .
- Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) 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 (see «CAM CHAIN INSTALLATION»(ref-371364-S15320402252010091000000) ), then Go to step 4. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION, Go to step 2 and recheck.
- Reset the PCM with the HDS.
- Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-371368-S30599352662010091000000) ).
- Check for Pending or Confirmed DTCs with the HDS. Is DTC P2279 indicated? YES -Check for vacuum leaks at the PCV valve, the PCV hose, the purge (PCS) line, the throttle body, the intake manifold, the brake booster, and the brake booster hose, then Go to step 1 . NO -Go to step 7.
- 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 Pending or Confirmed DTCs were indicated in step 6, go to the indicated DTC's troubleshooting. NO -If the screen indicates FAILED, Go to step 1 . If the screen indicates EXECUTING or OUT OF CONDITION, keep idling until a result comes on.
Scheme 828
Scheme 829
- Check the PCV valve (A), the hoses (B), and the connections for leaks or restrictions. (Scheme 828): Identifying PCV Valve And Hoses
- At idle, make sure there is a clicking sound from the PCV valve when the hose between the PCV valve and intake manifold is lightly pinched (A) with your fingers or pliers. If there is no clicking sound, check the PCV valve washer for cracks or damage. If the washer is OK, replace the PCV valve and recheck. (Scheme 829): Pinching Hose With Pliers
Scheme 830
- Disconnect the PCV hose.
- Remove the PCV valve (A). (Scheme 830): Identifying PCV Valve And Washer With Torque Specification
- Install the parts in the reverse order of removal with a new washer (B).