Service bulletins for the 2020 Kenworth T680
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.
68 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Fuel system are shown. Show all
| CE037 | 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. |
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| 43-076 | 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) | 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 | 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. |
| 44-033 | 2020-08-05. Service bulletin. FUEL SYSTEM, DIESEL. 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 summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.