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Home >> Buick >> 2000 >> Century Custom >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Engine Control System - Self-Diagnostics - 3.8L) >> Diagnostic Tests >> DTC P0602: Control Module Not Programmed >> Diagnostic Procedures
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Diagnostic Procedures

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  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Using special equipment, program PCM with correct software. Using scan tool, retest for this DTC. If DTC resets, go to next step. If DTC does not reset, repair is complete.
  3. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, repeat OBD system check.
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