I have experienced some problems with my '01 Sonata auto trans. The
problem is very erratic and comes and goes. When traveling at highway
speed, the trans will downshift from 4th to 3rd gear and the "check
engine" light will glow. Once you pull over and kill the ingition,
restart, and begin travel again all is fine for a while. I have reset the
computer by disconnnecting the battery and this helped for a while.
Recently the problem became more persistent, so I had it coded. The codes
I got were "P1529", and "P154 pending". Has anyone had similar experiences
and can anyone tell me what these codes mean?