Just had this issue with my 2007 Caliber.
When I googled the code for tips on how to fix, the answer was: don't replace the gas cap, get to the dealer, you need a dbrIII scanner and a smoke test machine. The tests will have to be done mutiple times to confirm.
In my situation is was the solenoid and the detector that failed. All rubber was good. They also reflashed the computer with updated firmware.
I noticed the improvement in the firmware. The car acts and feels better.
Too many cars, too many parts, too little coin, too little space to work in, too little time left to make it all happen!
Update: down to one ride, still too many parts, a little more jingle in the pocket, gaining space, and it's going to happen this year!
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