![]() ![]() P0109 is one of the several engine trouble codes related to a possible fault in the manifold absolute pressure (MAP) or barometric pressure (BARO) sensor circuit. If you have a scan tool with you, you may connect it to your vehicle’s OBD port to retrieve the specific error code. Your car’s check engine light will usually illuminate once the powertrain control module (PCM) detects a problem with any engine component. Modern vehicles are equipped with on-board diagnostic (OBD) systems that help you or a mechanic determine what’s causing certain issues in your vehicle. ![]()
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