why does my car stall so often with error code p1599 as the only code on 1999 Cadillac Seville SLS

whenever i drive my car long enought it stalls espically coming off the expressway it starts right back up and sometimes dies immidately erased codes and the only one that came back was p1599 have any ideal what the problem is mechanic is acting like a idiot

Asked by for the 1999 Cadillac Seville SLS
you may have a map senor or fuel pump or ign module grd issue which can cause low idle which will set this code. seek a diag of this code before repl any parts
the mechanic has told me it is probably the crank sensors
i think not myself, do you have crank sensor codes? according to all data its not the ckp sensor
the only code i have is the p1599 engine stall cc power management they told me that could have something to with the crankshaft sensors
could it be a wire splice
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