I figured out that it is an P0442 Evaporative Emission Control System Leak Detected (small leak)
Does anyone have experience with this or is it usually not a huge deal? Any input is appreciated.

 

Tighten your gas cap! Then have the code cleared or wait for it to cycle off again. That message is almost always a gas cap that doesn't seal well after you put gas in.

 

could there be any other causes?

 

i had my 04' in 4 times until it was fixed.the first time they replaced the gas cap.the other 2 times the emission sensor was replaced.the cure was to add a gasket seal that was missing from the factory!!this cured my problem and it has been running fine since.
this problem had the techs' puzzled until they visually inspected the instead of using the computer to detect the problem.

 

a gasket seal,where?im gonna check mine.

ive had this one code a couple of times.mostly after i fill up,and i realize i didnt tighten the cap,but recently it happened when my tank reached about 1/4 tank.

 

the gas tank has a line that recirculates back in to the engine for emissions, unlike older models vehicles which vented in to the atmosphere.this small leak is on this line which will show this code error.

 

i checked yesterday and only found 2 hoses.both are connected to the tank and fill hose.no other lines found. any other suggestions?i also have P0455 Evaporative Emission Control System Leak Detected (gross leak) on the truck.anyone ever have this.

 

Can I reset the light or does this have to be done by someone witht he right gizmo