# Service bulletin T2037D

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: 10170444
- Published by NHTSA: 2020\-01\-21
- Manufacturer's number: T2037D
- Manufacturer's date: 2019\-12\-10
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

This field action authorizes certified repair locations to upfit certain ISX15 CM2250 engines rated at 450hp or less with an improved Selective Catalytic Reduction \(SCR\) Catalyst, if the engine meets certain criteria including at least one of the identified fault codes: an active count of fault code 3151 \(SCR Catalyst System Missing\) or fault code 3582 \(SCR Conversion Efficiency\), or more than one inactive count within the last 250 engine operating hours, and must be less than 435K miles. This is an update to a previously submitted communication.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10170444-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10170444-9999.pdf)

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

## Components

Engine

## Vehicles listed

- CUMMINS ISX15

JSON: [/v1/bulletins/10170444](/v1/bulletins/10170444)

[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%20T2037D&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10170444&vehicle=Service%20bulletin%20T2037D)