Fuel System Monitor Quandary Resolving the Puzzle of Its Evasion

Some codes can prevent the continuous monitor of Fuel System (runs at startup) should be ready unless some code prevents it. No O2, Evap or fuel codes per GAP ... To allow your vehicle's monitors to perform their tests and reset them to a "ready" state, your vehicle will have to be driven in a special way called a "drive ... Diagnostic scanner? IIRC, these trucks have Misfire, EVAP, O2, Heated O2, Catalyst, Fuel System, EGR/CMP and I can't remember the last monitor. The fuel system monitor fails to get ready anyone have any input on this. I have did drive cycles and replaced thermostat and O2 sensor. There is no check ... Short answer. Get a VAG capable scan tool and check your fuel trims. If your fuel trims are high, you will have to figure out why. 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. Hello, After driving quite a while and a number of fuelings, the fuel system readiness monitor continues to show not ready for the looming ... 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 ... The " Catalytic, Evap, 2nd Sys, O2 Sensor (both heated & non-heated), and EGR System are all marked as not ready." Those all require specific ... It means your Onboard Diagnostic System (OBD II) has NOT completed all of its self-test monitors that keep an eye on the performance of your emissions control ...