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Q: 2002 F250 no codes come on incomplete drive cycle on 2002 Ford E-250

druven more than 1000 mi and still nothing

can it be a computer thing
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If you have one of several parameters that are not met it can cause what you have.You'll need to hook up a scan tool that can view live data and have a look at your basic parameters like ect,iat,o2s11,o2s21,o2s12,o2s22,vss,tpv,tpmode.
does the scan tool power up when you connect it to the dlc? I've also seen scrambled numbers when trying to retrieve dtcs caused by aftermarket performance chips.
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