The manifold absolute pressure (MAP) sensor monitors this and reports the information to the engine's computer. If the MAP sensor starts to fail, these are some of the most common symptoms: 1. Your engine accelerates poorly: If a MAP sensor fails, it can cause the engine's computer to miscalculate the amount of fuel and ignition timing Sensor voltage output ranges from 2.0 to 4.7V when turbo boost is causing a high intake manifold pressure. The range of pressure is 10 kPa to 350 kPa. The ECM provides a 5V reference to the sensor. The ECM also supplies sensor ground. The ECM calculates the amount of air entering the engine based on boost pressure and intake air temperature. What are the symptoms of a bad manifold absolute pressure sensor? The main symptoms of a bad manifold absolute pressure sensor include poor engine performance, roughly running engine, changes in fuel consumption, and increased gas emissions. MAP Sensor calculates the pressure inside the intake manifold. (Photo: Mechanic) Bad MAP Sensor Symptoms: Detecting The Issues. The symptoms of a failing manifold pressure sensor are similar to the problems of low compression or improper fuel injection. .

intake manifold pressure sensor symptoms