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P1604 Diagnostic Trouble Code Discussion for September 2007

PCM Internal Dual-Port Ram Read/Write Integrity Failure


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Trouble Ticket Help Requests for DTC P1604
Help Request Posted
1996 Cadillac Seville SLS 4.6L No Start, inst. cluste quits VIN: 1G6KY52983
P1604: Loss Of IPC Serial Data. this car will intermitantly not start due to vehicle theft deterent system then will start up, then the instrument cluster will just quit working some times driving down the road then will come back on line can not duplicate in the shop no other driving or run...
September 19, 2007
1996 Cadillac Seville SLS 4.6L No Start, inst. cluste quits VIN: 1G6KY52983
P1604: Loss Of IPC Serial Data. this car will intermitantly not start due to vehicle theft deterent system then will start up, then the instrument cluster will just quit working some times driving down the road then will come back on line can not duplicate in the shop no other driving or run...
September 19, 2007