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comnavguy
User
May 10, 2011, 7:32 AM
Post #1 of 2
(2581 views)
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P0420 Geo and Mazda
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Both of these cars, each in excess of 130,000 miles, is showing code 0420 "catalyst efficiency below threshold Bank 1"
Is that the catalytic converter? The question comes from one lady just replaced the converter a year ago.
Neither vehicle shows any codes for the 02 sensors.
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Hammer Time
Ultimate Carjunky
/ Moderator
May 10, 2011, 7:57 AM
Post #2 of 2
(2578 views)
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Re: P0420 Geo and Mazda
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95% of the time, that is a bad Converter. If she just had hers replaced, then it is under warranty. They carry a mandatory 5yr/50K
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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