# Service bulletin N232427260

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10245187
- Published by NHTSA: 2023\-11\-09
- Manufacturer's number: N232427260
- Manufacturer's date: 2023\-11\-09
- NHTSA component: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:DIESEL

## NHTSA's summary

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

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10245187-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10245187-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Engine

## Trouble codes named

P20EE, P2201

## Vehicles listed

- 2021 CHEVROLET 6500HD

JSON: [/v1/bulletins/10245187](/v1/bulletins/10245187)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20N232427260&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10245187&vehicle=Service%20bulletin%20N232427260)