DTC P1106 - MAP SENSOR CIRCUIT INTERMITTENT HIGH VOLTAGE GMC Envoy I

Note. For circuit reference, see WIRING DIAGRAMS - 4.3L article.

Circuit Description

Manifold Absolute Pressure (MAP) sensor responds to changes in intake manifold pressure (vacuum). A 5-volt reference is applied to sensor. A variable resistor moves in relation to manifold pressure and a voltage signal is returned to VCM through MAP signal circuit. Voltage signal varies from 1.0-1.5 volts at closed throttle to 4.0-4.5 volts at wide open throttle (low vacuum). VCM utilizes MAP signal and throttle position to determine fuel delivery.

Conditions for setting DTC

1. No TP sensor DTCs are set.
2. Throttle position is 0.4 percent or less when engine speed is 1200 RPM or less.
3. Throttle position is 20 percent or less when engine speed is greater than 1200 RPM.