Diagnostic Procedure
- Perform ON-BOARD DIAGNOSTIC II SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM. After performing OBD-II system check, go to next step.
- Reprogram PCM using required equipment. See EEPROM PROGRAMMING PROCEDURE . Retest system. If DTC P0601 is still present, go to next step.
- Replace and reprogram PCM. See POWERTRAIN CONTROL MODULE REPLACEMENT under POWERTRAIN CONTROL MODULE. After repairs are complete, see VERIFYING VEHICLE REPAIR under SELF-DIAGNOSTIC SYSTEM.