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Home >> Cadillac >> 1998 >> Seville STS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P0602 - Pcm Not Programmed >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK , then go to next step.
  2. Flash PCM with correct software. Check if DTC resets. If DTC resets, go to next step.
  3. Replace PCM. Program replacement PCM using required equipment.