Unveiling the Culprits Fuel System Monitor Not Ready and Why

Unset Monitors. Often, a failed inspection is due to system monitors not being ready. There are two types of monitors in a vehicle: Three ... Reconnect in the reverse ( red then black) after 20 minutes. Attach your obd 2 scanner and initially almost all monitors are incomplete. What I ... if the evap monitor is not ready, verify that your fuel cap is tight and the level of fuel is between 1/4 and 3/4 full. if all the other monitors are ready ... ... the drive cycle to set the OBDII system to show ready. ... The monitors I could not reset were the Oxygen Sense, Cat Monitor, and EGR system ... This condition can be achieved by letting the car to sit overnight. The ignition key must not be left ON position before the cold start. Its possible they are not fully passing, yet are not fully failing that monitor test. Sometimes it is not even the sensor itself, but a circuit related issue, ... 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 ... Did you recently pull the battery? Generally most modern cars require you to complete a certain number of specific drive cycles. This ... Diagnostic scanner? IIRC, these trucks have Misfire, EVAP, O2, Heated O2, Catalyst, Fuel System, EGR/CMP and I can't remember the last monitor. Now, switch the rear defroster and ac off and keep the speed of your vehicle at 90 km/hr (55MPH) nearly for 3 minutes. During this period, the purge and Fuel ...