1999 Cadillac Catera Q&A

1999 Cadillac Catera Question: gas cap light keeps coming on

I have replaced fuel cap, tank pressure sensor, checked all connections. Worked for a few days and the light comes back on Car loses power when this happens -
Answer 1
This is a pretty large subject. Here is an article I wrote about for 1 of the more common Evaporative System Codes and there are several. What is the Check Engine code and please be specific. http://repairpal.com/OBD-II-Code-P0442 -
Comment 1
There is no check engine light that comes on. There is a fuel cap light that comes on. The transmission seems to lose the first two gears when this happens -