Demystifying the Fuel System Monitor Unlocking its Secrets

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, ... Hello, After driving quite a while and a number of fuelings, the fuel system readiness monitor continues to show not ready for the looming ... For instance, the catalyst monitor will rely on the air fuel ratio sensor and oxygen sensor for it's test routine. If you check the air fuel ratio sensor test ... 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 ... I havent put a lot of miles on it since but my only monitors having a hard time setting are 02 sensor. The heater is good. Fuel system will ... 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 ... I read a response on a non tech site regarding saturn drive cycles that you must also cold start with the fuel level between 15 to 85 %, and do ... Diagnostic scanner? IIRC, these trucks have Misfire, EVAP, O2, Heated O2, Catalyst, Fuel System, EGR/CMP and I can't remember the last monitor. ... not ready" state, usually the Evap System, and pass smog. If you have a continuous monitor out of ready, even if it's the only one, you fail. 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 ...