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Eldorado 1998 Service engine soon

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Turn the key on, then press <Off> and <Pass Warmer> on the A/C buttons together for a few seconds until all the dash lights come on like you just turned on the key. Then, release both of them. The car's computers will go into the diagnostic mode and will poll the modules, one at a time, and display the codes on the dashboard message panel.

-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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