DTC P0601: Data Write Error, Or, Or DTC P0603: EEPROM Memory Error: Condition

DTC P0601 is set when a data write error occurred. DTC P0603 is set when EEPROM memory error occurred. This is a continuous monitor. MIL is illuminated when Powertrain Control Module (PCM) detects malfunction during 2 consecutive drive cycles. Possible cause is PCM malfunction.