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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P205B - P2BAA) And Symptoms) >> Diagnostic Information And Procedures >> DTC P227C-P227E: Barometric Pressure (BARO) Sensor 2 Circuit >> Circuit/System Description

Circuit/System Description

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The barometric pressure (BARO) Sensor 2, also referred to as the turbocharger inlet air pressure (TIAP) sensor, is integral to the multifunction intake air sensor and is used for humidity sensor signal correction. The sensor responds to changes in altitude and atmospheric conditions and gives the engine control module (ECM) an indication of intake air pressure relative to humidity. The ECM provides a 5 V reference and signal circuits to the TIAP which shares a low reference circuit with IAT 1 and 2. Ignition voltage and ground circuits are also supplied to the multifunction intake air sensor internal circuits for these sensors:

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