DTC P0602: Pcm Not Programmed ("U" Series): Description

PCM uses an Electrically Erasable Programmable Read Only Memory (EEPROM). EEPROM contains program information and calibrations required for engine, transmission, and powertrain diagnostics operation. EEPROM is not replaceable. When PCM is replaced or a calibration update is required, PCM must be programmed using a scan tool or approved Techline® equipment. See POWERTRAIN CONTROL MODULE  under PROGRAMMING.