When my 1994 Cadillac Elderado's "Service Engine Soon", light is out when ignition switch is on (car not started) and on when engine is started. What is my problem?
When I turn the ignition switch to the on position, the "Service Engine Soon
", light sometimes flashes on, but quickly go out. When I turn the ignition
switch on and start the engine, the "Service Engine Soon", light comes on
and remain on. I replaced the old gas cap with a new and the problem
remain. The "Service Engine Soon" light, (according the maintenance
manual) should be on when the ignition switch is in aux position and the
engine not started.
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