Test Description

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedures.

1 - The Diagnostic System Check - Engine Controls prompts the technician to complete some basic checks and store freeze frame data, if applicable. This creates an electronic copy of data taken when fault occurred. Information is then stored in the scan tool for later reference.
4 - This step checks whether DTC P0101 is the result of a hard failure or an intermittent condition. Operating vehicle in check mode enhances the PCM's diagnostic capabilities. For additional information on check mode operation, see CHECK MODE under SERVICE BAY TESTS under SELF-DIAGNOSTIC SYSTEM.
5 - This step checks for faults in MAF sensor electrical circuits that can cause the PCM to receive incorrect voltage signals. Normal MAF sensor signal on a warm engine at idle is 1.7-2.1 g/s.