CEL - Error Code 420: Catalytic Converter on Scion tC

Average mileage: 110,619 (55,000–175,000)
5 model years affected: 2005, 2006, 2007, 2008, more2009
16 people reported this problem
7 people shared problem details
2005 Scion tC90,000
Check Engine light came on while I was driving.. got a scan tool, it read "P0420" - Catalyst Efficiency Below Threshold (Bank 1) Considering I don't have an extra leg to sacrifice for a new converter.. I "Erased" the code with my scantool.. Boy.. THAT was easy! lol.
2005 Scion tC175,000
p0420 not sure what i am going to do
Just purchased the vehicle used from a used car dealer. 3 days later my engine light came on. Awsome car runs like a champ. No misfire no hesitations no sign of any malfunction whatsoever. Code is p0420 and im waiting for the dealer to fix this problem.
2005 Scion tC80,000
warning light is on....my scion tc is difficult to start...any ideas
2006 Scion tC98,000
Plan on replacing my cats soon
2005 Scion tC78,000
Replaced catalytic convertor under warranty
Check Engine Light Illuminated Problem: Diagnostic Showed Error Code 420: "Catalytic Converter Efficiency Below Threshold (Bank 1) Solution: Free Replacement by Dealer Under California 7yr/70k or Federal 8yr/80k Warranty Covering Emissions Parts
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