'02 Camry air leak?

[cdah4aloha]

I have an '02 Camry. It has an engine light on with code P0420. Idle is a little low and rough. There is a high pitch 'woop' sound every so often - once or twice a week. Code possibilities are Air leak in exhaust before rear HO2S. AF sensor error. Fuel system fualt. or Faulty catalytic converter. Has any one dealt with this before? Any recommendations on where to look for an air leak? Thanks. CDAH

[somick]

Look for TSB

No. EG013-04

Quote: “Some 2002 - 2004 model year Camry vehicles equipped with the 4 cylinder (2AZ-FE) engine may exhibit a M.l.L. ON" condition with Diagnostic Trouble Code (DTC) P0420 (Catalyst System Efficiency Below Threshold, Bank 1) in the Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM). The ECM (PCM) logic has been modified and a redesigned catalyst has been provided.
NOTE :The repair procedure in this TSB is similar to TSB No. EG013-04 "Excessive Sulfur Dioxide Odor." The recalibration of the ECM (PCM) should only be performed ONCE.”

Good luck,
Sam

[fathorsejr]

Check your air filter box and all the hoses that connect i had the same problem with mine make sure there are no leaks or nothing is loose once i tightened everything up i did not have that problem anymore