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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information and Procedures >> DTC P21C5 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different variant/trim than selected.

For an overview of the component/system, refer to : Exhaust Aftertreatment System Description

Circuit Description
5 V Reference Regulated voltage supplied by the control module.
Serial Data The control module input circuit has an internal resistance connected to 5 V.
Low Reference Grounded through the control module.
Component Description
B212 Reductant Sensor Module The sensor sends measured values and state of health information via serial data to the ECM and the reductant control module.
K115 Reductant Control Module The control module controls the heating and dosing of the reductant.