O2 sensor isn't performed right away, usually EGR and some others are performed after fully warming up, but the O2 sensor is usually performed within 25 miles of driving. Look up the conditions, its usually the fuel tank level has to be between 3/4 and 1/4 of tank, more or less and it won't perform, the engine does have to be cold soaked overnight, and although they say its needs to be less than 60° (might be different for the WK2) I have still seen it performed in summer when morning temps were higher. I have seen that last test (evap emissions take more than 2 weeks before its performed and the test cycle is complete). I have only seen the Evap Emission Test remain outstanding more than a week or a 100 miles driving. The one exception is the Evap Emissions Test, which is usually last and requires some very specific conditions out of your control, like a cold soaked start in the morning under 60☏. If you do normal in town and highway driving it usually completes all the tests within 50 miles, maybe a little more sometimes, you have to do some stop and go driving as well as a highway speed steady cruise. So its possible to get the all the emissions test to initiate and complete within as little as 25 miles of driving, it sometime takes longer. The recommended Drive Cycle is to set the conditions for the test to initiate and complete. You do know that when you erase codes it resets the emission test status, so you may have been checking it while doing 140k miles of driving, but if you're erasing or reseting with the tool everytime you hook it up, you're reseting the emissions test status and starting from scratch each time. Are you assuming you'll fail emissions because of your cheap OBDII reader? Or you went to emissions inspection and they told you failed for the test readiness status not being complete?ĭid you ever think it could be your cheap OBDII reader?
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