Conditions For Running DTC

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

HO2S Bank 1 Sensor 1 & Bank 2 Sensor 1

The engine speed is between 500-3000 RPM.
The engine run time is less than 3 minutes.
The Mass Air Flow (MAF) is between 4-30 g/s.
Battery voltage is 9-18 volts.

HO2S Bank 1 Sensor 2

The engine cold start is determined.
The average Mass Air Flow (MAF) during warm-up is less than 30 g/s.
The battery voltage is between 10-18 volts.