Diagnostic Aids
WARNING: This page is about a different car, the 2002 Isuzu Rodeo Sport and 2002 Isuzu Rodeo. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0601 indicates that contents of EEPROM have changed since PCM was programmed. Only possible repair is PCM reprogramming or replacement. Check service bulletins to program the replacement PCM with correct software and vehicle calibration.