Well I've got a small issue here and was hoping I could get some insight. Lately, I've been getting a CEL that reads P0450, which is an Evap Pressure Sensor malfunction. Now, it is VERY intermittent, it usually takes one to three weeks before it starts to come back on after I pull the battery cable to reset the code. From searching, I found that it could possibly be a leak in the fuel lines, but if it was a leak wouldnt the CEL come on consistently? I'm assuming that the Evap Pressure Sensor is going bad, thus being the reason for the CEL coming on at intermittent stages. Before I go dish out $157 on a new Pressure sensor, does anyone else know what might cause this trouble code to be thrown out?