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Home >> Chevrolet >> 2015 >> Spark LS, Standard Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - JATCO CVT >> Diagnostic Information and Procedures >> DTC P0863: Transmission Control Module (TCM) Communication Circuit >> Circuit/System Description

Circuit/System Description

At each ignition ON, the transmission control module reads the oil pressure calibration data stored in the CVT ROM assembly.