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Could A Bad Battery Cause The Check Engine Light To Come On

could a bad battery cause the check engine light to come on When you turn the ignition on before starting the car, the "check engine" light is supposed to come on indicating that the engine computer (also could be called ecm Alternator topics what is an alternator symptoms of a bad alternator proper alternator operation alternator testing with a voltmeter temperature When you turn the ignition on before starting the car, the "check engine" light is supposed to come on indicating that the engine computer (also could be called ecm Check engine light on? need help now? click the banner below to ask an expert: scantool companion can help you diagnose your engine. ...