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P1604 Diagnostic Trouble Code Discussion for January 2025

PCM Internal Dual-Port Ram Read/Write Integrity Failure


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Trouble Ticket Help Requests for DTC P1604
Help Request Posted
2016 Toyota Corolla L 1.8L No Start, MIL Lamp on VIN: 5YFBURHE1G
P1604: Startability malfunction. ... tried 3 times to start the vehicle and it was a crank no start. They finally started it and drove it to the shop. Now the problem will not duplicate. Only codes P1604 and P0300. I haven’t dug to deep into the diagnostic yet. I’m waiting til in the morn...
January 28, 2025