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?
Read about this one too, I make sure the gas cap clicks several times after I gas up. It still clicks even after the CEL comes on so i'm assuming, hopefully, that it's not the gas cap.
Little update on this, I went ahead and ordered a new evap pressure sensor from www.toyotaworld.com seeing as how the dealer wanted about $190 for it. My CEL came on again two days ago and instead of clearing the code like I usually I decided to ride it out and see if it goes away on its on. Well, it went away last night while I was at blockbuster, anyone know why the CEL would have cleared itself? I'm sure it'll come back on within a week or so.
Final update for this thread. My new Evap Pressure Sensor came in last week and I've gone through about 3 tanks of gas without a CEL light. Hope this solves my issue.
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