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Re: Stupid 02 sensor question
Posted to Emissions Forum on 3/3/2012

Robert,

i explain it this way, the O2 monitor does not have to complete prior to the CAT running, but a part of the O2 testing must run and pass. The O2 and CATs are what we call parallel monitors. If the O2 passes repsonse testing and the CAT criteria is me... Login to read more.