Fast Pass Test

During the fast pass the HO2S 2 voltage is between 381-525 mV and less than 180 samples within the first 1 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 1,080 out of 1,200 samples.
• Each sample is 100 ms during both tests.
• This diagnostic runs once per trip.