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Home >> Oldsmobile >> 2001 >> Aurora 4.0 C >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 4.0L >> Diagnostic Tests >> DTC P1621: Powertrain Control Module Memory Performance >> Diagnostic Procedures

Diagnostic Procedures

  1. If powertrain diagnostic system check has already been performed, go to next step. If powertrain diagnostic system check has not been performed, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM CHECKS.
  2. Replace PCM. Program replacement PCM. See PROGRAMMING . After repairs, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM CHECKS.
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