Diagnostic Tip to Diagnose Emission Reduction Fluid Tank Electrical Connector Inspection, Reduced Power Message, Service Emissions System, System Displayed on the Drivers Information Center (DIC) Malfunction Indicator Lamp (MIL) Illuminated – DTC P02C1, P21DD, P221C, P10D9, P10F3, P143C, P20B9, and/or P221E – 2020-2022 Cadillac Chevrolet GMC
NHTSA ID Number: 10224850 Manufacturer Communication Number: 21-NA-006 Summary This bulletin provides a possible location of a bad connection at the reductant fluid tanks electrical connector. Condition Some customers may comment that the MIL is illuminated and a reduced power message with a Service Emissions System message as well. Some technicians may one or more of …