N232427260

Customer Satisfaction Program - Certain vehicles may experience an illuminated Check Engine Malfunction Indicator Lamp (MIL) with Diagnostic Trouble Code (DTC) P2201 NOx Sensor Circuit Performance Sensor 1 and/or DTC P20EE Diesel Exhaust Fluid (DEF) System NOx Trap Low Efficiency set in the DEF Control Unit (DCU). Dealers will reprogram the diesel exhaust fluid control module with a corrected service calibration