I have a Voyager 2001 that has gone thru **** and finally managed to address all CEL's. But at one point, in order to clear codes I disconnected my batterie and ended up with P1684 which I need to clear in order to be able to inspect it. I have driven the van over 150 miles and it refuses to get ready for inspections. I tried the turn on drive forward a few feet then drive on reverse a few feet then turn off and repeat this three times, but it did not work. Any suggestions other that keep on driving.