1988 Cadillac DeVille sedan unsure from North America
Love this car, its old, but beautiful
Failed emissions at inspection.
Service soon light is coming on.
Paint is peeling, (what do you want for 19 years old)
If anyone has any advice for this engine service light, please hit me up. all fluids are full and I'm guessing this might be a common problem with these cars.
Overall so far its ridden nice, though I wish it passed inspection.
Love this car, got it for next to nothing. it rides so nice, its comfortable and has power everything.
I flunked emissions so I just today had the cat converter replaced.
Service soon light comes on after being on highway.
Would you buy another car from this manufacturer? Yes
Review Date: 3rd March, 2007
31st Dec 2007, 00:35
Mine does that too, I'm guessing its the oxygen sensor (02 sensor). It also contributes to bad emissions if it has failed. They need replacing around 90-100k.
3rd Jan 2013, 09:58
I too have an 88 Caddy Deville, and my service soon light comes on, but what's weird about it is it comes on when I start it, but goes off when it is put into drive, and always seems to come back on in the same spot on my daily drive to work.
My question would be, did you have anything modified on the car such as exhaust, engine etc? I heard that when these models are modified, it causes the engine lights and service lights to come on.
Just wondering, because I did modify the exhaust with a Flowmaster exhaust to give it a little rumble.
29th Mar 2007, 18:37
It is better the "service soon" light comes on and not the "service now". I have found that the "service soon" light in these Cadillacs are fairly accurate in trying to indicate there is a problem, no matter how minor. I usually find that the light will go off if the right thing is adjusted. It's a pain in the neck, but don't disregard the light.