Measures pressure in the intake manifold — vacuum on a naturally aspirated engine, boost on a forced-induction one. On engines without a mass air flow sensor this is the primary load input. A disconnected vacuum hose reads atmospheric pressure and sets a code with nothing electrically wrong.
Also known as: map, map sensor, manifold pressure sensor, manifold absolute pressure, mapsensor
Referenced by 29 codes
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MAP stands for Manifold Absolute Pressure, and the middle word is the one that matters. It is not a vacuum sensor. It does not measure how much lower than atmospheric the manifold...
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