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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Controls And Fuel - 2.0L (LUZ) Diesel - DTC P2122 To DTC P2689 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P227B: Barometric Pressure (BARO) Sensor 2 >> Circuit/System Description

Circuit/System Description

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The 2.0 L (LUZ) diesel is provided with two barometric pressure (BARO) sensors. BARO sensor 1 is integral to the engine control module (ECM) and is not serviced as a separate unit. BARO sensor 1 provides a voltage signal to the ECM relative to atmospheric pressure changes. The ECM uses this information to calculate fuel delivery. The BARO sensor 2 is integral to the multifunction intake air sensor and is used for humidity sensor signal correction. The ECM compares both BARO sensor signals for correlation at low engine operating speeds to determine sensor performance failures.

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