FixVault

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

WARNING: This page is about a different car, the 2011 Hyundai Elantra Touring. However, it is still accessible from the selected car via links, so may be relevant.
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 3 times at TCU wake up
Diagnostic Time
  • -
Fail Safe
  • Locked in 3rd gear.