# Service bulletin 44\-033

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: 10177942
- Published by NHTSA: 2020\-08\-05
- Manufacturer's number: 44\-033
- Manufacturer's date: 2020\-07\-21
- NHTSA component: FUEL SYSTEM, DIESEL

## NHTSA's summary

Non\-Safety Campaign – The end cap welds on certain fuel tanks may not meet internal quality standards due to improper weld equipment settings. The fuel tanks will be replaced.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177942-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10177942-9999.pdf)

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

## Components

Fuel system

## Vehicles listed

- 2020 KENWORTH T680
- 2020 KENWORTH T800
- 2020 KENWORTH T880
- 2020 KENWORTH W900
- 2020 KENWORTH W990

## Recalls for the same vehicles and component

- [2021323](/recalls/tc/2021323.md), 2021-05-26: Fuel System
- [21V391000](/recalls/nhtsa/21V391000.md), 2021-05-26: FUEL SYSTEM, DIESEL:FUEL INJECTION SYSTEM:FUEL RAIL

## Other bulletins for the same vehicles and component

- [CE037](/bulletins/11032292.md), 2026-05-06, Warranty extension: FUEL/PROPULSION SYSTEM. KW \& PB DEF Quality Sensor part number Q21\-6127\-001 for Cummins X15 engines has been added to this warranty policy.
- [43\-076](/bulletins/11027058.md), 2026-01-06, Service bulletin: FUEL/PROPULSION SYSTEM. Certain vehicle model years 2020\-2025 K270, K370, T270, T280, T370, T380, T480, T680, T880, W900 chassis have updated Greenhouse Gas \(GHG\) labels available for installation.
- [03\-087 \(E295\)](/bulletins/10232496.md), 2023-03-06, Service bulletin: FUEL SYSTEM, OTHER:FUEL FILTER; ENGINE AND ENGINE COOLING. Certain Model Year 2021\-2024 chassis with PACCAR MX engines and optional fuel filter restriction virtual gauge may display incorrect restriction levels. The virtual gauge will be temporarily disabled until a revised sensor strategy is developed.
- [43\-071](/bulletins/10201965.md), 2021-10-05, Service bulletin: FUEL SYSTEM, DIESEL. Fix\-As\-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid \(DEF\) sensors are available. As a temporary solution, after PACCAR confirms a DEF sensor is not available, a temporary software update will allow a vehicle to continue operation with a failed DEF sensor by disabling the DEF sensor diagnostics.
- [21KWC](/bulletins/10198759.md), 2021-07-06, Service bulletin: FUEL SYSTEM, GASOLINE. Safety Recall – Cummins Fuel Rail Leak – NHTSA ID: 21V391 / TC: 2021\-323, Cummins Recall: C2423. Cummins PX9 and ISX12 fuel rails may leak around a sealing washer, potentially resulting in fuel leaks. Undetected prolonged diesel fuel spray in the presence of an ignition source may increase the risk of fire.

JSON: [/v1/bulletins/10177942](/v1/bulletins/10177942)

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