Question about Buick LeSabre
Code 12 is ecm functioning properly this is normal and tells you it is ok and it can read problem codes. 13 is 02 sensor open curcuit,
Posted on Mar 12, 2011
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Posted on Jan 02, 2017
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When the Check Engine light (or Service Engine Soon or small picture of an engine) is turned on, the systems computer control unit (called the PCM) has sensed a fault in the electronic controls of the engine and/or the emission system. When this happens you will seldom feel the car engine run any different. There are about 200 possible system faults (the gas cap is just one of them) that turn the Check Engine light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen/Oriley and Autozone parts stores (USA only) do this testing for free.
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