EarnieEarns

1990 Cadillac Deville - Service Engine Soon Light & "d" Error on display (Pictures)

Recommended Posts

Hello!

I have a 1990 Cadillac Deville, 4.5L V8 PFI, 75,068 Miles.

Today I was driving and all of a sudden the SERVICE ENGINE SOON light came on and both the Fuel In Tank and Electronic Climate Control read outs started showing a “d”. (See pictures in links below).

https://i.imgur.com/urkMrQF.jpg

https://i.imgur.com/jnIw9xU.jpg

https://i.imgur.com/VXwOqxk.jpg

Gallery

On top of this the Air conditioning fan started blowing air from the dash, not hot or cold, just ambient temperature air and I can’t change the Climate Control or see the fuel level anymore.

When I got home I unhooked the battery to reset it then turned the ignition on without starting the car and pressed “Off” and “Warm” on the climate control so see if I could get a code it looked like a code flashed (to fast for me to read), then it read 000 and would blink over to .7.0 occasionally.

I replaced some vacuum hoses that were kind of bridle as well as replaced the o-ring that goes between the air filter housing and the carburetor since it was cracked. I hooked the battery back up and the dash read-outs still showed “d”, SERVICE ENGINE SOON light, and the air was still blowing from the dash.

I called around and neither Auto Zone or O’rilleys has the OBD 1 connector to scan the older (pre 1996) cars.

The car runs great so it’s hard to trouble shoot whats going on, and I cant find anything at all online about this specific problem.

 

Any ideas or suggestions?

Share this post


Link to post
Share on other sites

So is yours working properly now?

Welcome to CaddyInfo Forum.


GM FAN FOREVER

Nice, clean, luxury= fine automobile

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing   0 members

    No registered users viewing this page.