I know this is a weird question to post on a Toyota site, but is anyone here familiar with Saturns? Specifically the Saturn L200? There is a sensor in the gas tank that has been replaced but is still causing a CEL and we need to fix that before emission time in July. So, I was wondering if anyone had any pointers on what could also be causing the CEL, because the sensor was replace along with the gas cap and the light was reset and it instantly threw the code again. Do you think maybe it was a bad sensor? How would we trace the wiring to see if that is the problem?

 

Well there's a reason they don't make Saturns anymore... But more importantly, what code are you getting ??

 

It is a 2003 L200 and we are getting P0442 I think it's ccalled the fuel tank pressure sensor..

 

I could be wrong, and hopefully someone will correct me if I am....

I think that has to do with the evap system... Usually, I just tell people to replace the gas cap, and 9 times out of 10, that fixes the issue... however... that other 1 time, it turns out to be a leak in the vapor recovery lines.... Basically... this means... I would get a fsm and try to figure out which lines are used for that, and check them ouit... It could be as simple as just replacing a small section of rubber hose, that isnt allowing the tank to hold any pressure....

Before this code... when u opened the gas cap, did it hiss, and let a lil pressure out? Does it still do that if it did before? If not, that is likely the cause....