Fast Pass Test

During the fast pass the HO2S 2 voltage is between 381-525 mV within the first one minute and 30 seconds of engine run time. If the fast pass test does not report a pass then the regular test is initiated.

Regular Test

• During the regular test the HO2S 2 voltage is between 390-520 mV for at least 2 minutes.
• This diagnostic runs once per trip.