Its only been a few weeks since buying the Commander and have already addressed a parasitic draw issue caused by the sunroof.... Thread here. https://www.jeepcommander.com/forum...cussion/74699-parasitic-draw-found-fixed.html
Unfortunately, over the past week a P0452 code keeps coming back after being cleared. "P0452: Emission Control System Pressure Sensor Low Input"
So.... is the sensor usually the culprit, or would the "low input" indicate there is an abnormally low pressure (leak) in the system?
In addition, looking for the EVAP pressure sensor online, Im unsure as to where exactly the sensor is or what it looks like. Am I correct in the assumption that it is part of the "FUEL VAPOR CANISTER LEAK DETECTION PUMP" or as RockOuto calls is a "Vapor Canister Purge Valve / Solenoid"? This fits to the charcoal filter canister and upon removal, it appears the wiring harness connecting to it actually only powers what looks to me like a pressure sensor within the unit. The "check valve" within the unit seems to be mechanical contraption. The image after the link shows the two shiny circle parts which I believe are the pressure sensors itself. Is this the Pressure sensor?
The part in question... https://www.rockauto.com/en/moreinf...3/dlGj+2/MoWxGokNYMoLyoXR6O3l9rOTrntuSejSD+1d
Furthermore, is it wishfull thinking that the fuel cap may be whats causing a low pressure reading "if" the sensor is actually ok?
I dunno.... guess Ill throw one of the above units AND a fuel cap at it and see what happens. :surprise:
The vehicle is also very hard to put gas in as it keeps tripping the pump nozzle thinking is full when its not.... I took off all the lines having to do with the fill tube assembly and the evap canister etc and blew compressed air through them and found NO obstruction.
Unfortunately, over the past week a P0452 code keeps coming back after being cleared. "P0452: Emission Control System Pressure Sensor Low Input"
So.... is the sensor usually the culprit, or would the "low input" indicate there is an abnormally low pressure (leak) in the system?
In addition, looking for the EVAP pressure sensor online, Im unsure as to where exactly the sensor is or what it looks like. Am I correct in the assumption that it is part of the "FUEL VAPOR CANISTER LEAK DETECTION PUMP" or as RockOuto calls is a "Vapor Canister Purge Valve / Solenoid"? This fits to the charcoal filter canister and upon removal, it appears the wiring harness connecting to it actually only powers what looks to me like a pressure sensor within the unit. The "check valve" within the unit seems to be mechanical contraption. The image after the link shows the two shiny circle parts which I believe are the pressure sensors itself. Is this the Pressure sensor?
The part in question... https://www.rockauto.com/en/moreinf...3/dlGj+2/MoWxGokNYMoLyoXR6O3l9rOTrntuSejSD+1d
Furthermore, is it wishfull thinking that the fuel cap may be whats causing a low pressure reading "if" the sensor is actually ok?
I dunno.... guess Ill throw one of the above units AND a fuel cap at it and see what happens. :surprise:
The vehicle is also very hard to put gas in as it keeps tripping the pump nozzle thinking is full when its not.... I took off all the lines having to do with the fill tube assembly and the evap canister etc and blew compressed air through them and found NO obstruction.