I have a p0725 and a p15..( for the speed sensor codes)

SOURCE: 2002 Dodge Caravan, Tranny would shift, DTC P0700, P0725

replace the input speed sensor to transmission and the wiring pigtail all are available at your chrysler dealer take your vehicle registration in to the parts counter so they have your vin # to get the right part and it is the front of trans by fluid linres to radiator.

SOURCE: engine speed signal circuit

there is currently a recall being performed on altimas and there is also a updated crank position sensor check with your dealer for open recalls on your vehicle (its just a phone call away have your vin # ready (located on left bottom of windshield if your facing it from in front of vehicle it is on lower right side of windshield - also look on driver door jamb.

SOURCE: code P0725 , P0443 , Po1391 , 2000 dodge dakota

Can't find p0725 but should be a trans code. p0443 Evap purge solenoid circuit p1391 Intermittent loss of cam or crank

SOURCE: 02' Nissan Altima, car jerking, turns off at

If it has a code for loosing the crankshaft position sensor signal, I would certainly start looking at that before venturing into the fuel system. Cam and Crank sensors are a common failure item for Nissans of that era. Nissan actually redesigned the sensor and i think they performed a recall on some vehicles. They are fairly inexpensive and easy to replace. I believe they run about $40 each. Because most people don't have access to a powerful scanner or a digital storage oscilloscope to verify the failure I recommend replacing the cam and crank sensors at the same time.