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1984 Eldorado service soon message

Started by Billharrison, September 24, 2017, 04:59:43 PM

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Billharrison

I have a 1984 Eldorado with approximately 60,000 miles with a digital dash. A message light has come on saying service soon. When I checked the codes using diagnostics on the instrument panel it showed code #29. Does anyone have any experience with this issue ?
1959 Cadillac Series 62 Flat Top
1964 Cadillac Eldorado
1966 Cadillac Fleetwood Brougham

TJ Hopland

I'm not sure where my 84 manual is but from memory that is either an overdrive code or has to do with idle controls.    I think both of those are code 29 it just depends on the specific year make and model. 
StPaul/Mpls, MN USA

73 Eldo convert w/FiTech EFI
80 Eldo Diesel
90 CDV
And other assorted stuff I keep buying for some reason