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September 21, 2021 Service bulletin

Fix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are...

Kenworth technical service bulletin 43-071 for 2016-2021 Kenworth T680, 2016, 2021 Peterbilt 379 and 2016-2021 Peterbilt 579 and others.

Bulletin number
43-071
Component
Fuel system, diesel
Summary
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.

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