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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 99 (HVAC - Automatic) >> Diagnostic Information and Procedures >> DTC P156A-P156C >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

For an overview of the component/system, refer to:Automatic HVAC Description and Operation 

Component Description
B1 A/C Refrigerant Pressure Sensor The pressure sensor is a 3 wire piezoelectric pressure transducer.
K20 Engine Control Module The control module contains a microprocessor used to process input data to control outputs.
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