What happens when the intake manifold pressure sensor fails?

[SanAlan]

Intake manifold pressure sensor failure symptoms: 1. Open or short circuit inside the sensor; 2. The sensor output signal cannot change with the variation of intake manifold vacuum; 3. The output signal voltage is too large or too small, deviating from the normal range; 4. Blockage or air leakage in the vacuum hose between intake pipes, or blockage of intake manifold vacuum ports. Additional information: The intake pressure sensor (Manifold-Absolute-Pressure-Sensor), abbreviated as MAP. It connects to the intake manifold via a vacuum tube, sensing vacuum changes in the intake manifold as engine speed and load vary. These changes are then converted into voltage signals through internal resistance changes in the sensor, which the ECM uses to adjust fuel injection quantity and ignition timing angle.