# P20EE on the 2022 Chevrolet 5500XD

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P20EE

- [11006063](https://open.wenmarpro.com/bulletins/11006063), 2024-08-07: Certain vehicles may erroneously experience an illuminated Check Engine Malfunction Indicator Lamp \(MIL\) with Diagnostic Trouble Codes \(DTC\) P2201 NOx Sensor Circuit Performance Sensor 1 and/or P20EE Diesel Exhaust Fluid \(DEF\) System NOx Trap Low Efficiency. Dealers will reprogram the ECM and/or the DCU with the corrected service calibrations.
- [11002035](https://open.wenmarpro.com/bulletins/11002035), 2024-06-25: This technical bulletin provides repair information to correct a customer concern of DTC P20EE DEF Control Unit Recalibration.