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what do i need to do to get my car smogged ?.
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asked
Jul 23, 2018
by
anonymous
i need to get a smog this year. my scanner shows p0421 warm up catylst below threshold bank 1. 2001 mazda 626, 4-cyl, 2-liter, automatic transmission. do i change the sensors first?, then what?
2001
mazda
4-cyl
p0421
626
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Apr 10, 2018
by
Carguy1
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Hi there,
Based on the code you likely need a new catalytic converter, this is the one directly off the exhaust manifold. It's usually part of the manifold.
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