Modern vehicles rely on a massive amount of electrical systems, sensors, and control modules to keep the wheels turning. Some of those devices are well-known, like your car’s main computer or engine control module (ECM), which helps control things like fuel injection, ignition timing, and various other actions. Other electrical components are less-well known, despite having equally critical responsibilities. One such part is the manifold absolute pressure or MAP sensor. The MAP sensor is responsible for monitoring the air
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