# Service bulletin TSB210251

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: 10231604
- Published by NHTSA: 2023\-02\-13
- Manufacturer's number: TSB210251
- Manufacturer's date: 2022\-12\-20
- NHTSA component: ELECTRICAL SYSTEM:WIRING

## NHTSA's summary

This Technical Service Bulletin was issued for a fault code of 3559. The cause of this is to be deterimend the OEM wiring connector to the aftertreatment DEF dosing unit is loose at the back of the connector at the weather pack seal. Need verification by verify fault code 3559 active or inactive. Locate the OEM harness aftertreatment DEF dosing unit connector. Pull up OEM harness wire cover on the backside of the aftertreatent DEF dosing unit connector. Check for loose weather pack seal.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10231604-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10231604-9999.pdf)

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

## Components

Electrical system, Wiring and fuses

## Vehicles listed

- CUMMINS CUMMINS

JSON: [/v1/bulletins/10231604](/v1/bulletins/10231604)

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