08 CS, 98K miles. Getting an intermittent CEL code #0455-Evap Emission Sys detected leak (large leak) No signal communication. Gas cap IS on. Where is the sensor for the evap system? Every few times I also get at the same time #2404-Invalid data received from HVAC module, upper limit exceeded. Any ideas where that sensor is? Do they share a ground or connector? Any help appreciated. Oh yea, Durametric is worth it's weight in gold....

 

I bought a new cap and it fixed mine. Cheap and easy fix. There were some other suggestions here like the purge valve....https://www.6speedonline.com/forums/...l-gas-cap.html

 

Thanks, that's what I was looking for.

 

No problem, glad to help.