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Home >> Buick >> 2019 >> Encore Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (HVAC System - Automatic) >> Diagnostic Information and Procedures >> DTC B040A >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2018 Chevrolet Trax and 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

The HVAC module communicates with the air ionizer via serial data. This DTC indicates a fault in the air ionizer. The air ionizer may continue to operate normally when this DTC is set.

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