99 Deville ( Check gas cap ) Check engine light

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99 Deville ( Check gas cap ) Check engine light

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99 Deville ( Check gas cap ) Check engine light - 6/30/2008 3:07:56 PM

99CaddyNH

Posts: 14
Joined: 6/27/2008
Status: offline

I just picked up my Devillefrom oil change , coolant change and complete brake job. As soon as I started it I noticed the check gas cap and Check engine lights are on. This happened to my moms 07 Focus, on hers I just twisted the gas cap and it all went off in two minutes. On my caddy the lights arent going off.

Post #: 1

RE: 99 Deville ( Check gas cap ) Check engine light - 6/30/2008 7:20:44 PM

Katzmans Caddy

Posts: 1186
Joined: 12/3/2006
Status: online

It may take a few ignition cycles but just go into the DIC and clear the codes, it will go out once you do that.

(in reply to 99CaddyNH)

Post #: 2

RE: 99 Deville ( Check gas cap ) Check engine light - 6/30/2008 10:50:26 PM

99CaddyNH

Posts: 14
Joined: 6/27/2008
Status: offline

Thats what i did. it went away. Thanks Katzmans

(in reply to Katzmans Caddy)

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RE: 99 Deville ( Check gas cap ) Check engine light - 7/1/2008 7:39:05 AM

Katzmans Caddy

Posts: 1186
Joined: 12/3/2006
Status: online

(in reply to 99CaddyNH)

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RE: 99 Deville ( Check gas cap ) Check engine light - 7/17/2008 4:36:22 PM

gigantor

Posts: 10
Status: offline

I had the same trouble with my ''99 Deville. I replaced the gas cap with one from the auto parts store - it fit, but it never seemed to seal well. I figured I would just live with the unending light show and reset the warnings every so often. That didn''t last too long - I ended up buying a new cap from the dealer. The "check gas cap" and SES warnings seem to have gone away. I hope they do not come back. I read somewhere that this problem could cause the car to get lower gas mileage. After I put the dealer cap on the car, my mileage did improve from 22 to 24.5.

(in reply to 99CaddyNH)

Post #: 5