gas cap light keeps coming on on 1999 Cadillac Catera

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

by in Denver, CO on May 13, 2010
1 answer 1 comment
ANSWER by on May 13, 2010
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
2 people like thisFlag inappropiate
COMMENT by on May 13, 2010
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