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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.

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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??

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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

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