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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information and Procedures >> DTC P20EE, P249D, or P249E >> DTC Descriptor

DTC Descriptor

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
DTC P20EE

NOx Catalyst Efficiency Below Threshold

DTC P249D

Closed Loop Reductant Injection Control At Limit - Flow Too Low

DTC P249E

Closed Loop Reductant Injection Control At Limit - Flow Too High

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