MAP

Scan Tool Range 0-125 kPa/0.0-6.99 Volts: The Manifold Absolute Pressure (MAP) sensor measures the change in the intake manifold pressure from engine load, and speed changes. As intake manifold pressure increases, the intake vacuum decreases resulting in a higher kPa reading. The scan tool MAP sensor voltage display can read as high as 6.99 volts when the MAP sensor signal circuit is open. This is caused by the scan tool software and should be considered normal. The actual signal circuit voltage is 4.9-5.0 volts.