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P1604 Diagnostic Trouble Code Discussion for January 2010

PCM Internal Dual-Port Ram Read/Write Integrity Failure


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Trouble Ticket Help Requests for DTC P1604
Help Request Posted
2002 Mazda 626 LX 2.5L No Start VIN: 1YVGF22D72
P1604: Key ID (Code Word) Not Registered In The PCM. Hey Guys, This 626 was purchased as a wreck at auction and when the guy couldn't get it running, it wound up here. No spark, no injector drive. When I clear the 2 codes, they reset as soon as the key is turned on. The theft light is off when the key is off, ...
January 11, 2010
2002 Mazda 626 LX 2.5L No Start VIN: 1YVGF22D72
P1604: Key ID (Code Word) Not Registered In The PCM. Hey Guys, This 626 was purchased as a wreck at auction and when the guy couldn't get it running, it wound up here. No spark, no injector drive. When I clear the 2 codes, they reset as soon as the key is turned on. The theft light is off when the key is off, ...
January 11, 2010