February 15, 2011I am have a problem on my 2003 F250 5.4.I took my truck to get a smog check last week and it failed because 2 monitors were incomplete my (oxygen sensor and oxygen sensor heater) I took my truck to the Ford dealer and they told me they couldn`t manually turn those two monitors on. They just told me I have to drive the truck some more??? I`ve been through 2 tanks of gas and I`m really getting tired of driving around. The 2 monitors are still incomplete a week later. I uninstalled my Hypertech programmer (back to stock settings) about 3 weeks prior to taking it in. I`m thinking that the programmer may have something to do with this. Has anyone been through this and know what I can do to cure this headache? I have taken my truck to 3 different smog places and they all have the same answer, to drive it more til the computer learns again. Are they serious How many more miles and how much more time??? Should I reinstall the programmer?
Forums : Engines-Gasoline 8-cyl : 2003 5.4 not passing smog?? HELP! (1476 Views)
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February 15, 2011we have a similar system here in pa. ive had some trouble with vehicles no passing all monitors. unhook the battery for a few minutes and drive it some more, start all the monitors all over again. no guarantee but it has worked a few times for me, and yes it might take a whole weekend or tank of gas
Six in a row makes it go!
February 16, 2011It took me 3 or 4 weeks to get all my monitors to pass!!! PITA!
February 16, 2011Did you disconnect the battery? then drive your truck by each individual drive cycle? or did you just do normal driving for 3-4 weeks? about how many miles? Sorry for all the ?`s. as you can see, I just want this b*$#! to pass before my tags are due.
February 16, 2011My 2001 had a similar problem a few months back, turns out it was the thermostat. It was making the truck run 10*F below normal and the monitor wouldn`t pass.
February 16, 2011I was tired of messing with it and went without tags for 11 months...lol
I finally took it to my mechanic and made him do it.
He borrowed a computer off a friend of his that would monitor everything, and he kept resetting the computer in the truck till all the monitors passed.
It took a LONG time for him to get it right!
February 16, 2011I dont know about Cali but here in NY if you disconnect the battery you have to drive it 500 miles for the computer to relearn everything so if you do be prepared to fail the test.
the programmer may have everything to do with failing. after market engine tuning can screw everything up. not always but they can. a cold air intake can cause it to fail too. I had put a brute force cold intake on my 08 and it tripped the check engine light after 6 months, took it out and the light immediately went off.