I have a 2004 cavalier with 69000 miles. Runs great. Transmission new valve body, new transmission fluid, new filter. Drive sometimes great, sometimes terrible. Shift 1-2 great,2-3 -4 very fast, car turn off sometimes. Check light is on. Code p1860 and sometimes p0742. Check wire everything good, transmission fuse good, voltage 12V. Thanks.

 

which fuse did you check?
the system is detecting a open, short to grd, short to power. how did you check the wiring?


there are 2 related tsb that could apply
search 02-07-30-022b and 03-07-30-036