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HOMESERVICE MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 146 (PCV SYSTEM)DTC TROUBLESHOOTINGDTC P2279: INTAKE AIR SYSTEM LEAK
2002 Honda Civic Si

DTC P2279: Intake Air System Leak

2002 Honda Civic SiSECTION DTC P2279: Intake Air System Leak
WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If DTC P0443 is stored at the same time as DTC P2279, troubleshoot DTC P0443 first, then recheck for DTC P2279.
  1. 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? 

    1. YES  - Go to step 2.
    2. NO  - Repair or replace the damaged parts, then go to step  4.
  2. 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.
  3. Monitor the OBD STATUS for DTC P2279 in the DTCs MENU with the HDS.

    Does the screen indicate FAILED? 

    1. YES  - Check the camshaft timing, J35A6 engine (see TIMING BELT INSTALLATION ), J35A7 engine (see TIMING BELT INSTALLATION ), then go to step 4.
    2. 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.
  4. Reset the PCM with the HDS.
  5. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
  6. 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.
  7. Check for Temporary DTCs or DTCs with the HDS.

    Are any Temporary DTCs or DTCs indicated? 

    1. YES  - If DTC P2279 is indicated, check for vacuum leaks at the PCV valve, the PCV hose, the purge (PCS) line, the throttle body, the intake manifold, and the brake booster hose, then go to step  1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
    2. NO  - Go to step 8.
  8. Monitor the OBD STATUS for DTC P2279 in the DTCs MENU with the HDS.

    Does the screen indicate PASSED? 

    1. YES  - Troubleshooting is complete.
    2. NO  - If the screen indicates FAILED, go to step  1 and recheck. If the screen indicates NOT COMPLETED, go to step  6 and recheck.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.