![]() ![]() ![]() The fuel system monitor allows the PCM to evaluate how close the fuel control system can regulate the fuel mixture in attempting to achieve an optimum air/fuel ratio in the combustion chamber throughout varying engine rpm and load ranges. That’s it.OBD II Readiness Monitors Continuous Monitors Fuel System Monitor Decelerate down to 20mph without braking or depressing clutch (for manual transmissions).accelerate smoothly to 55mph and maintain speeds for 5 minutes.Get on a freeway, accelerate smoothly to 55mph and maintain speeds for 3 minutes.This should just be natural city driving for a few minutes. Put the vehicle in gear, drive up to 35mph, and come to a complete stop.Idle for 3 minutes with electrical equipment on (A/C, headlights, and rear defroster turned on).(For example, after leaving the car overnight) Don’t leave your keys in prior to the cold start. You can perform this later at night so that there is less traffic. Here are general instructions which should work for most vehicles. You can follow the general instructions, or find your specific vehicle instructions below. Please note that depending on the model, make, and year of the vehicle, you will need to perform certain steps in order to get all the monitors in a ready state. But if you want to make sure, or you know you need to conduct a drive cycle, follow these instructions. This will naturally occur over time if you have not had any battery issue, or if there is no problem with your vehicle. In order to get your vehicle in a ready state, you need to drive your vehicle in different conditions. Getting your OBD2 Monitors Ready – Performing a Drive Cycle Clearing out the OBDII monitors using a scan tool.A problem either indicated by a check engine light, or soon to be reported by the check engine light.Vehicle computer updates or requiring an update.For example, if you have recently jump started your vehicle due to a weak battery, it’s possible the monitor information has been reset. How did my car get into a not ready state? 2007 and newer Diese vehicles can have 2 OBD2 monitors in a not ready state.1996-2006 Diesel Vehicles can have 1 monitor in a not ready state.2000 and newer gas vehicles must have ALL monitors in a ready state with the exception of the EVAP monitor. ![]()
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