Fuel System Monitor Dilemma Unraveling the Causes of Its Obstinacy

Issue: You may come upon a vehicle readiness issue in which only the fuel system monitor is not ready. Summary: Beginning with model year 2011, ... In order to get the OBDII system to set the monitors to "Ready," the vehicle needs to be driven through a drive cycle/drive trace. If you don't ... A weak cat can cause the monitor to never come ready. EVAP is a system to suck the evaporated fuel out of the tank, through a charcoal filter, ... I havent put a lot of miles on it since but my only monitors having a hard time setting are 02 sensor. The heater is good. Fuel system will ... But normally the evap drive cycle to complete you need more than 1/4 tank of gas but not more than 3/4 tank of gas, it must sit over night, and ... What component of the EVAP system is not ready? ... During this step the OBDII system checks for ignition misfire, fuel trim and EVAP canister ... Have you tried finding and following the procedure for clearing all the monitors? If this is for emissions testing many jurisdictions allow one, ... A vehicle is not ready (and cannot pass a compliance test) if it has not had enough operation since the OBD memory was last cleared (also known as a “code clear ... ##Idle the vehicle for 2-3 minutes. This executes the O2S Heater, Misfire, Secondary AIR, Fuel Trim, and Purge system monitors. ##Drive the ... Fuel system normally completes almost instantly after startup, even if the battery was disconnected. If it doesn't it could be because a parameter is out of ...