Question about 1991 Cadillac Brougham

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My service engine light keep coming on once i reach high speeds over 60 mph

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Service (engine warning light) or service due?

Posted on Dec 09, 2009

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Hi,
This is a problem that affects many cars and trucks. Usually it is a matter of a tune up. When the sensor detects that the motor is running rough it tells you to service the engine. On my truck this happens at 55mph and above. I really can't feel or hear any roughness, but there is a slight hesitation. So I get a tune up and that solves the problem.
On my Sentra I get a continuous light due to a gas tank cap that won't quite seal good enough to create the required vacuum for EPA standards. Sometimes replacing the cap will solve this problem.

Hope this Helps,
RSMITH972278
P.S. PLEASE RATE MY ASSISTANCE.

Posted on Dec 09, 2009

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Posted on Jan 02, 2017

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