Quote:
Originally Posted by ft_sjo
There is no 'post secondary cat o2 sensor'.
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So where is the secondary (narrow band) O2 sensor installed? Is it after the primary cat but before the secondary cat? If so, a CEL eliminator should still work.
Just remember that whatever you do, NEVER PLACE A ANTI-FOULER ON THE PRIMARY (WIDE BAND) O2 SENSOR!!!