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Home › Kia › 2012 › Optima Hybrid › Repair and Diagnosis › Transmission › Automatic Trans › Automatic Transaxle System Diagnosis - HEV › DTC P0605: Internal Control Module-Read Only Memory-ROM Error › General Information › DTC Detecting Condition

General Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • ROM checksum error
  1. ROM data reprogram illegally
  2. PCM/TCM
Enable Conditions
  • Ignition "ON"
Threshold Value
  • Checksum error or PCM/TCM fault
Diagnostic Time
  • 1 Driving cycle
Fail safe
  • Locked into 4th gear
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