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Home › Chevrolet › 2000 › Lumina › Repair and Diagnosis › Engine Performance › System › Engine Controls Self-Diagnostics - 3.1L › Diagnostic Tests › DTC P0602: Pcm Not Programmed › Diagnostic Procedure

Diagnostic Procedure

  1. Perform powertrain diagnostic system check. See POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing powertrain diagnostic 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, system is okay.
  3. Replace PCM. Program replacement PCM using required equipment. See PROGRAMMING . After replacing PCM, repeat powertrain diagnostic system check. See POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
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