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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.


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Old Wed, July 6th, 2011, 10:51 PM
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Rear O2 sensors are not turned off on catalyst emission monitoring from custom tunes are they? Is that more of a special request while ordering tune thing? Or is it possible to de-activate them from reading with the Gryphon?
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Old Thu, July 7th, 2011, 09:20 AM
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Originally Posted by DarrenWS6 View Post
Rear O2 sensors are not turned off on catalyst emission monitoring from custom tunes are they? Is that more of a special request while ordering tune thing? Or is it possible to de-activate them from reading with the Gryphon?
Upon special request Bill can turn them off when the tunes are written......

Otherwise a person can go with sct and turn them off with the hand held programmer...
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