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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 54 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (2 Of 3)) >> Diagnostic Information and Procedures >> DTC P203C or P203D >> Circuit/System Description

Circuit/System Description

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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.
Signal The control module input circuit has an internal resistance connected to 5 V.
Low Reference Grounded through the control module.
Component Description
B213 Reductant Level Sensor The resistance of the sensor changes with fluid level.
K115 Reductant Control Module The control module controls the heating and dosing of the reductant.
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