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Posted by Alan Kane on February 23, 2007, 9:32 pm, in reply to "Re: Low cat efficiency question. "
Hi mark,

Do you mean that changing a front O2 fixed a P0420 code?

I was under the impression that unless the signal from the front sensor was within spec then the EMS would not run the cat monitor. Was I wrong in thinking this?

Alan

Message Thread:

Low cat efficiency question. - Joe McGeoghan February 21, 2007, 1:32 pm
replies - Jim Watson February 21, 2007, 3:29 pm
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