Quote:
Originally Posted by mults
... So, my questions is: Why did it pass in 2018 and not now? Is Ohio monitoring more parameters, or did I not go through a proper drive cycle? ...
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If you hadn't made enough drive cycles, the system would report it as not ready; not that the system was disabled. You can check using an OBD reader.
My guess is that your system has been disabled (via tune) and the previous check was done by a shop/employee that didn't check everything.