Has anyone ever seen a vehicle with any of the three continuous monitors (fuel system, misfire, and comprehensive components) not setting to the ready status? I have a 2013 Impala LT that has the fuel system monitor not setting to ready. I've personally never seen this before. I have removed the battery terminals and connected them with a jumper wire then reconnected and test driven. So far only EGR, Catalyst, and the other two continuous monitors have set leaving the fuel system, O2, O2 heaters, and evap left to set. No codes, nor pending codes. I've viewed mode 6 for the heaters and it shows some specific test passing and others not having been ran yet. Any ideas?

Jeremy Adams
Technician
AAA Car Care Center
Cary, North Carolina, USA