Depends on what the code is, Converter should be left on the car, if you want to pass inspection! This may be a reprogram of the cars computer(PCM) or it may need an 02 sensor. If it's0420 there is a fix and this is it:
M.I.L. "ON" DTC P0420
PRODUCTION CHANGE INFORMATION
TECHNICAL SERVICE BULLETIN
Reference Number(s): EG024-04, Date of Issue: April 03, 2007; July 27, 2004; July 07, 2004 TOYOTA:'02 - '04 Camry (2AZ-FE) (Non PZEV) SECTION:Engine Superceded Bulletin(s):, Date of Issue: July 01, 2004 Related Ref Number(s): EG024-04
All previous versions of this TSB should be discarded.
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.
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April 3, 2007: A new step 3 and Figure 2 have been added to the ECM Reprogram Procedure (regarding removal of the 10A ECU-IG fuse). Previous Figure 2 is now Figure 3. July 27, 2004: The OP Code in the Warranty Information table has been changed from Combo A to Combo B. July 7, 2004: The Parts Information, Warranty Information, Applicable Vehicles and the Note in the Introduction have been changed.
Some 2002 - 2004 model year Camry vehicles equipped with the 4 cylinder (2AZ-FE) engine may exhibit a M.I.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.
2002 - 2004 model year Camry vehicles equipped with the 2AZ-FE engine (non PZEV) and automatic transmission produced BEFORE the Production Change Effective VINs shown below.
I will email the entire Tech bulliten so you can check the VIN against the bulliten.
Saturday, November 11th, 2017 AT 6:33 PM