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Paul M ASE Master
Paul M ASE Master, ASE Master Tech
Category: Cadillac
Satisfied Customers: 4684
Experience:  ASE Master Tech 20+Years
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1984 cadillac eldorado: Wont start.

Resolved Question:

1984 cadillac eldorado. Won't start. Code roubleshoot shows Code 15 and code 30 alternately. Was stopped for dinner, when I got back in car, it wouldn't start. Code 15 shows when checked. Is it serious and what remedy ?
Submitted: 6 years ago.
Category: Cadillac
Expert:  Paul M ASE Master replied 6 years ago.

Hello and thank you for using Just Answer


code 15 is for the Coolant Temp Sensor


and could cause your no-start


I would replace the coolant temp sensor


and then hold the pedal down 3/4 of the way when attempting to start (to clear any unburnt fuel from the cylinders)


let me know how you make out and if you need more help


the code 30 is for the idle speed control but I would start with the coolant temp sensor




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