I have been trying to get this code cleared for around a month in between work when I have time to mess with it. I’ve done quite a bit of research and I find all the info on cleaning and closing off the Knox sensors and replaying fuse #36. I’ve done all of that and all the codes it was throwing went away other than U0074 which pops back up on every start up. I have went at far as cutting off the connections on the passenger frame (4 in total is what I’ve cut off) taped them up separately and clearing the codes. Still getting U0074. At this point I’m not sure what to do next. Do I replace a module I’m not educated on or am I missing a connection I need to clean? Either way, thanks for reading and all future help!
Cooler27
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12,795 Posts
codes on the new trucks do not "clear"
you need to do a drive cycle of up to 180 miles without the historic code before the computer will delete it.
you need to do a drive cycle of up to 180 miles without the historic code before the computer will delete it.
Joined
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12,795 Posts
no.
you need to drive whatever the computer wants without and input from the "historic code" before it will delete it.
the O2 sensor codes from the bad cats on my 14 took 260 miles to delete after i replaced the cats.
took 90 miles to delete the evap emissions code.
took 6300 miles to clear everything for it to pass emissions at state inspection.
the heated O2 sensors was the biatch, because that truck did not have heated O2 sensors.
you need to drive whatever the computer wants without and input from the "historic code" before it will delete it.
the O2 sensor codes from the bad cats on my 14 took 260 miles to delete after i replaced the cats.
took 90 miles to delete the evap emissions code.
took 6300 miles to clear everything for it to pass emissions at state inspection.
the heated O2 sensors was the biatch, because that truck did not have heated O2 sensors.
Joined
·
12,795 Posts
No everything has to be working properly for it to delete
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