Code P0106, Map Sensor Range Problem - "S" & "T" Series 4.3L (VIN W): Notes

Manifold Absolute Pressure (MAP) sensor responds to changes in manifold pressure (vacuum). Control module receives this information as a signal voltage that varies from 1-1.5 volts at idle to 4-4.6 volts at full throttle. Scan tool displays manifold pressure in volts. Low pressure (high vacuum) reads a low voltage, while high pressure (low vacuum) reads a high voltage. If MAP sensor fails, control module will substitute a fixed MAP value and use throttle position sensor to control fuel delivery.

1. Checks MAP sensor output voltage to control module. This voltage represents a barometric reading to control module.
2. Applying 10 inches of vacuum to sensor should cause voltage to change. The value obtained by subtracting second reading from first reading should be greater than 1.5 volts. Change should be instantaneous.
3. Remove sensor from bracket and gently twist sensor to check for intermittents. Voltage changes of greater than 0.1 volt indicate a bad connector or connection.