Misfire monitor, fuel system, componentmonitor, catalyst monitor, heated catalyst, EVAP system, secondary air sys, 02 sensor, O2 sensor heater EGRand/or WVT. There will be an OK if each of them works fine. [Not all vehicles have these 10 parts] LAUNCH CR3001 Screen Display Support Car ...
in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed.If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. ...