Car Problem Reports

Scion tC CEL - Error Code 420: Catalytic Converter

Scion tC Problem
12 Reports
Me Too

Model Years Affected: 2005, 2006, 2007, 2008

Average Mileage: 104,671 mi (55,000 mi - 175,000 mi)

  • Visitor, , 90,000 mi

    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.

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  • Visitor, , 80,000 mi

    warning light is scion tc is difficult to start...any ideas

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  • Visitor, , 98,000 mi

    Plan on replacing my cats soon

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  • Visitor, , 175,000 mi

    p0420 not sure what i am going to do

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  • Visitor, , 78,000 mi

    Replaced catalytic convertor under warranty

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  • garyla, , 56,000 mi

    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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