Fuel System Monitor Enigma Solved Uncovering the Reasons for Its Inaction

Did you change batteries or disconnect the battery? (main cause of issue). Because if you did it takes a long time to set this monitor to ready. In order to run the monitor, it needs to see: Ambient temp needs to be between 40f. and 95f. Also the difference between engine coolant temp and ... B. Fuel System Monitor ... The following conditions must be met: ... Fuel level above 1/4 tank. ... Battery condition fair or above, i.e. 11v-14v. ... Idle-up or PTO ... 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 ... 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 ... It failed fuel system readiness because the JB4 is manipulating the fuel rail pressure, so it isn't passing readiness. Take the JB4 off, clear codes, drive it ... BUT i went to complete a drive cycle after the codes were cleared and i checked after 100 miles and the evap and fuel system are not ready. this ... If the Malfunction Indicator Light (MIL) comes on steady for 20 seconds and then blinks for 10 seconds , the I/M (Inspection/Maintenance) test ... Ensure that the vehicle meets the conditions for a cold start listed above. ⇒ If the evaporative emission (EVAP) I/M System Status indicator ... 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, ...