Question about 1996 Cadillac DeVille
This means something is wrong. The next step is to pull the error codes, from the computer. DO NOT let this condition continue, as other damage may occur. Any incorrect emission issue exposed your converter to damage...
Posted on Dec 11, 2009
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Posted on Jan 02, 2017
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The check engine light/service engine soon (yellow light) comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system u will seldom feel the car engine run any different, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.
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