Q: Check Engine light on
The Check Engine light is coming on.
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The powertrain control module (PCM) takes inputs from dozens of sensors. It then uses this information to control outputs such as fuel delivery and emissions equipment. If the PCM detects a problem anywhere in the system it will illuminate the Check Engine Light. There are literally hundreds of potential causes for the light being on. A trained professional will be able to retrieve the corresponding diagnostic trouble codes to analyze your vehicle and make the repairs that will clear the Check Engine Light.
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