Unlocking the Secrets Why Your Fuel System Monitor Refuses to Collaborate

have the fuel tank between 30 and 70 percent full. some systems, especially the evap system, need to have a specific level of fuel in order for ... It failed because of "fuel system not ready " code on their scanner. They gave me 30 days extension and said ride it more often since no check engine light. 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, ... No amount of driving will typically cause the Fuel System to become Ready/Clear/Pass. A Pending code can stop the Readiness Monitoring process. This test is done automatically in the middle of the night, when it is not being driven, after the engine has fully cooled down, and it repeats ... 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 ... Ensure the fuel level is between 1/4 and 3/4 tank · Park the car for over 10.5 hours (typically left overnight). Must be between 40-113°F ambient ... The PCM has a software routine called the Diagnostic Executive that schedules, runs, suspends "monitor tests". Several conditions will suspend - ... chances are the ecu just did not have enough time to cycle and set the readiness codes. give it more time and try again. Have you tried finding and following the procedure for clearing all the monitors? If this is for emissions testing many jurisdictions allow one, ...