P1604 Diagnostic Trouble Code Discussion for May 2025
PCM Internal Dual-Port Ram Read/Write Integrity Failure
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| Help Request | Posted | |
| 2017 Toyota 86 2.0L No Start, Poor Idle Quality P1604: Running instability. Engine was replaced for a rod knock. Engine ran fine but knocked. Engine was removed disassembled crank turned new bearings new rings and then reassembled. Engine cranks normal and sounds normal cranking, however when it tries to start it runs for about 2 ... |
May 04, 2025 | |
| 2017 Toyota 86 2.0L No Start, Poor Idle Quality P1604: Running instability. Engine was replaced for a rod knock. Engine ran fine but knocked. Engine was removed disassembled crank turned new bearings new rings and then reassembled. Engine cranks normal and sounds normal cranking, however when it tries to start it runs for about 2 ... |
May 28, 2025 |
