LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 2001 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 108 (Engine Control System Self-Diagnostics - 3.4L) >> Self-Diagnostic System >> Intermittent Conditions >> Incorrect PCM Programming
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Incorrect PCM Programming

WARNING: This page is about a different car, the 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, 2002 Chevrolet Monte Carlo, and 2002 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
  1. There are only a few situations when reprogramming a PCM is appropriate, such as the following:
    • A new service PCM is installed.
    • A PCM from another vehicle is installed.
    • Revised software or calibration files have been released for this vehicle.
    NOTE: DO NOT reprogram the PCM with the SAME software or calibration files that are already present in the PCM. This is not an effective repair for any type of driveability problem.
  2. Verify that the PCM contains the correct software or calibration. If incorrect programming is found, reprogram the PCM with the most current software or calibration. See POWERTRAIN CONTROL MODULE  under PROGRAMMING.
scientia non olet · About LEMON Manuals