2002 Toyota Camry, California
Code P0420 tripped and I want to make sure its the CAT before I replace it. My car isnt losing fuel economy, the transmission is okay. The car idles pretty low and the temp guage doesnt reach operating temp (too cold) even at highway speeds. I know its likely Id have to replace the CAT but could low temp cause the the CAT to run inefficiently and trip the PO420? The car runs very smooth with no loss to power. The only other known issues is the Thermostat.
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