P0605 Internal Control Module Read Only Memory (ROM) Error: DTC Detecting Condition

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P0605 INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM) ERROR

Item	Detecting Condition	Possible Cause
DTC Strategy	ROM checksum error	Faulty TCM
Enable Conditions	IG "on"
Threshold Value	Checksums of SW and calibration data are different from the origins 3times at TCU wake up
Diagnostic Time	-
Fail Safe	Locked in 3 rd gear.