Conditions For Setting DTC

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

The pre-catalyst HO2S voltage remains above a predetermined lean value during the test.
The short term FT does not increase a calibrated amount during the test.
Both conditions above exist for 3 consecutive tests.