Bruce Nunnally Posted June 11, 2018 Report Share Posted June 11, 2018 83 Cadillac Guy said: I have a 1983 Cadillac 4dr sedan which has the service soon light on all the time. The codes I got from the computer were l.8.8 29,52,53. Could you help me find out what is wrong with this car. Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
cdgrinci Posted June 11, 2018 Report Share Posted June 11, 2018 The codes you provide appear that they may be OBD1 codes (cars pre '96). Here is a url https://repairpal.com/gm-obd-I-code-chart Is the car performing poorly, and how long has the service soon been illuminated. I might clear the codes and see which one comes back. You listed a 29 and that code isn't represented at the site I checked. Chuck '19 CT6, '04 Bravada........but still lusting for that '69 Z-28 Link to comment Share on other sites More sharing options...
83 Cadillac Guy Posted June 12, 2018 Report Share Posted June 12, 2018 The car has recently been tuned up and runs very good, the light has been on for quite awhile. Link to comment Share on other sites More sharing options...
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