Manifold Pressure/Vacuum Sensor: Testing and Inspection

SCAN TOOL TESTING
The scan tool displays manifold absolute pressure and will display both volts and kPa of pressure. Key "ON," engine stopped, (no vacuum), MAP will display high voltage or pressure, while at idle (high vacuum), MAP will display low voltage or pressure. Likewise, on acceleration, MAP will display high and on deceleration will display low voltage. A failure in the MAP sensor, or circuit should result in a DTC 33 or DTC 34. Testing and Inspection