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PCV System Acura TL III

Auxiliary Emission Control Systems 3 illustrations ~547 words

DTC P2279: Intake Air System Leak

Note. If DTC P0443 is stored at the same time as DTC P2279, troubleshoot DTC P0443 first, then recheck for DTC P2279. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

  1. Check for vacuum leaks at these parts: PCV valve PCV hose EVAP canister purge 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.
  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? YES -Check the camshaft timing (see step 22 on «TIMING BELT REPLACEMENT»(/acura/tl/iii-2003-2006/remont/mechanical/#cylinder-head__timing-belt-replacement) ), 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.
  4. Reset the ECM/PCM with the HDS.
  5. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#idle-control-system__ecmpcm-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? 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, or 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. 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? 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 6 and recheck.

Scheme 127

Scheme 127: PCV Valve Inspection
Scheme 127: PCV Valve Inspection

Scheme 128

Scheme 128
Scheme 128
  1. Remove the intake manifold cover (see step 1 on «REMOVAL»(/acura/tl/iii-2003-2006/remont/exhaust/#intake-manifold-and-exhaust-system) ).
  2. Check the PCV valve (A), hoses (B), and connections for leaks or restrictions.
  3. At idle, listen to the PCV valve (A) with a stethoscope as you lightly pinch the PCV hose (B) with your fingers or pliers several times. Each time the hose is pinched, the valve should click. If there is no clicking sound, check the PCV valve grommet for cracks or damage. If the grommet is OK, replace the PCV valve and recheck.
  4. Install the intake manifold cover (see step 9 on «INSTALLATION»(/acura/tl/iii-2003-2006/remont/exhaust/#intake-manifold-and-exhaust-system) ).

Scheme 129

Scheme 129: PCV Valve Replacement
Scheme 129: PCV Valve Replacement
  1. Remove the intake manifold cover (see step 1 on «REMOVAL»(/acura/tl/iii-2003-2006/remont/exhaust/#intake-manifold-and-exhaust-system) ).
  2. Remove the bolt (A). NOTE: Take care not to spill oil on the hot exhaust manifold.
  3. Remove the PCV valve (B).
  4. Install the valve in the reverse order of removal NOTE: When installing a new PCV valve, make sure the O-rings (C) are in place. When installing a used PCV valve, use new O-rings (C).
  5. Install the intake manifold cover (see step 9 on «INSTALLATION»(/acura/tl/iii-2003-2006/remont/exhaust/#intake-manifold-and-exhaust-system) ).

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