Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Chevrolet >> 2020 >> Spark LS, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Data Communications >> Diagnostic Information and Procedures >> DTC B2B12 or B2B13 >> Circuit/System Description

Circuit/System Description

This diagnostic applies to internal microprocessor integrity conditions within the device. The device monitors its ability to read and write to the memory. No external circuits are involved.