VERLO1 Posted November 3, 2011 Report Share Posted November 3, 2011 04 DEVILLE THE CHECK GAS CAP HAS COME ON. I INSTALLED A NEW CAP AND AFTER A FEW CYCLES THE IT DID NOT CHANGE. WHAT WOULD I LOOK FOR NEXT. THANK YOU WAYNE Link to comment Share on other sites More sharing options...
Texas Jim Posted November 3, 2011 Report Share Posted November 3, 2011 Check for codes... Write them down... Post them here... Then we can help you diagnose what the problem is... And please.... stop typing in ALL CAPS... Link to comment Share on other sites More sharing options...
Ranger Posted November 4, 2011 Report Share Posted November 4, 2011 And please post the code definitions along with the codes. http://myweb.accessus.net/~090/dtcobd2.html Link to comment Share on other sites More sharing options...
VERLO1 Posted November 4, 2011 Author Report Share Posted November 4, 2011 Check for codes... Write them down... Post them here... Then we can help you diagnose what the problem is... And please.... stop typing in ALL CAPS... the code finally came up. It is po455. Thank you waiting for your reply. Link to comment Share on other sites More sharing options...
VERLO1 Posted November 4, 2011 Author Report Share Posted November 4, 2011 And please post the code definitions along with the codes. http://myweb.accessus.net/~090/dtcobd2.html The code is p0455 Link to comment Share on other sites More sharing options...
Texas Jim Posted November 4, 2011 Report Share Posted November 4, 2011 Check for codes... Write them down... Post them here... Then we can help you diagnose what the problem is... And please.... stop typing in ALL CAPS... the code finally came up. It is po455. Thank you waiting for your reply. P0455 - Evaporative Emission (EVAP) System Leak Detected (GAS CAP?) This indicates a vacuum leak in the system. Check the vacuum hoses going to the purge canister. If they are OK... check the vacuum hoses running to the fuel tank. Has any work been done under the hood lately?? Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 4, 2011 Report Share Posted November 4, 2011 Stick your nose into the driver side rear wheel well and smell for fuel, there is a pipe that runs from the fuel inlet to the tank, look to see if that pipe is corrodes through Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
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