Below find the compilation I have in my files.
I hope it will help,
Sam
P0420
Look up TSB 05-027. You probably have the "bad igniter
connections" problem outlined in that TSB.
There is also a Safety Recall out on your car (97 Accord) for the throttle cable, item
# 99I002000. Might not be causing this problem, but it's worth checking to
see if this has been addressed.
http://www.carkb.com/Uwe/Forum.aspx/...o-LX-hesitates
Toyota
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.”