The Service Engine Soon light has been coming on in my 1990 Cadillac Deville for about 6 mo. A mechanic checked the code and said it was EO39. I have driven it 2 mo. Since then. I notice no difference in how the car performs with the light on or off. It runs great, quiet, great pickup, etc. I asked a mechanic at a ransmission shop, and he told me he needed to overhaul my transmission for about $2,000. I said no and have been driving my car ever since. A few days ago the light came on and ididn't go off so I took the car and had the transmission flushed and serviced. The ligh went off, but today it came back on. What do you think about it? What do you think I should do? Thanks.
Tuesday, November 30th, 2010 AT 6:19 AM