2020 Kenworth T440 problems, complaints & recalls
Safety recalls (4)
Service Brakes, Air:supply:reservoir/Tank 2024-02-23 · campaign 24V145000 · 936 vehicles
Defect: PACCAR Incorporated (PACCAR) is recalling certain 2009-2021 Kenworth C500, 2012-2021 Kenworth T440, 2009-2015 Kenworth T660, 2015-2024 Kenworth T680, 2009-2024 Kenworth T800, 2009-2020 Kenworth T370, 2014-2023 Kenworth T880, 2011-2016 Kenworth T470, 2023 Kenworth T480, and 2009-2019 Kenworth W900 vehicles. The air tanks have an insufficient volume of air for the brake system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air
Risk: Insufficient air volume can reduce braking performance and increase the risk of a crash.
Fix: Dealers will install the correct volume air tanks, free of charge. Owner notification letters were mailed August 12, 2024. Additional owner notification letters were mailed October 27, 2025. Owners may contact PACCAR customer service at 1-425-828-5888. PACCAR's number for this recall is 24KWD.
Steering:critical Fasteners 2022-04-25 · campaign 22V277000 · 17,641 vehicles
Defect: PACCAR Incorporated (PACCAR) is recalling certain 2018-2020 Kenworth T270, T370, T440, T470, T660, T680, T880, T800, W900, W990; and 2018-2020 Peterbilt 330, 337, 348, 365, 367, 389, 520, 567, and 579 vehicles. The Dana D-Series axle steer arm fasteners that attach the steering arm to the steering knuckle may fail.
Risk: Fastener failure can result in a loss of steering control, increasing the risk of a crash or injury.
Fix: Dealers will replace and torque the steer arm fasteners, at no charge. Owner notification letters were mailed November 8, 2022. Owners may contact Kenworth customer service at 1-425-828-5888 and Peterbilt customer service at 1-940-591-4220. PACCAR's numbers for this recall are 22 PBB and 22 KWB.
Electrical System:wiring 2021-12-29 · campaign 21V00N000 · 1,107 vehicles
Defect: PACCAR Incorporated (PACCAR) is recalling certain 2016-2022 Peterbilt 567, 579, 2021-2022 Peterbilt 536, 2017-2021 Kenworth T880, 2016-2022 Kenworth T680, 2018-2020 Kenworth T440, 2020 Kenworth T270, and 2021 Kenworth T280 vehicles. The methane detection system will not function if the system loses power.
Risk: The operator may be unaware of a system malfunction or the presence of excessive methane levels, increasing the risk of injury or fire.
Fix: Dealers will re-wire the warning alarm, free of charge. Owner notification letters were mailed December 1, 2022. Owners may contact Peterbilt customer service at 1-940-591-4220, and Kenworth customer service at 1-425-828-5888. PACCAR's numbers for this recall are 21KWH and 21PBN.
Fuel System, Diesel:fuel Injection System:fuel Rail 2021-05-26 · campaign 21V391000 · 612 vehicles
Defect: PACCAR Incorporated (PACCAR) is recalling certain 2018-2021 Peterbilt 337, 348, 365, 367, 520, 567, Kenworth T270, T370, T440, T470, T800 and T880 vehicles. The sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leak.
Risk: A fuel leak in the presence of an ignition source increases the risk of a fire.
Fix: Dealers will inspect the rail threads and fuel lines, and replace the rail as necessary, free of charge. Owners may contact PACCAR customer service at 1-425-828-5888 (Kenworth) or 1-940-591-4220 (Peterbilt). PACCAR's numbers for this recall are 21KWC and 21PBD.
Service bulletins (19)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine 2026-09-11 · P001 · Service Bulletin/Repair Instructions
"kenworth: dealers should check the chassis list and sir weekly for vin changes. 2 chassis added to the chassis list. peterbilt: dealers should check the chassis list and sir weekly for vin changes. 10 chassis added to the chassis list."
Service Brakes 2025-10-28 · 24KWD · Service Bulletin/Repair Instructions
safety recall additional chassis have been included. the chassis list has been updated. certain t370 / t440 / t470 / t480 / t660 / t680 / t800 / t880 / w900 / c500 chassis may be equipped with air tank reservoirs that have less than twelve times the combined volume of all service brake chambers whic
Engine And Engine Cooling 2022-10-18 · 45-064 · Service Bulletin/Repair Instructions
info only - paccar is introducing over-the-air (ota) software updates for engine my17 and newer chassis equipped with cummins x15, x12, isx12, isx12n, l9n, px-7, and px-9 engines the technology will leverage the existing remote diagnostic cs hardware to deliver secure software updates remotely. this
Steering 2022-05-10 · 22KWB · Service Bulletin/Repair Instructions
safety recall ã¢ââ interim notification - the dana d-series front axle steer arm fasteners that attach the steer arm to the steering knuckle may fail, increasing the risk of a crash or injury. repair information will be added when a repair procedure and parts are available.
Equipment 2022-02-04 · 51-013 · Service Bulletin/Repair Instructions
due to major data carriers phasing out 3g networks, chassis currently utilizing first generation peoplenet mobile gateway (pmg001) will experience severe 3g service degradation as early as january of 2022. chassis currently utilizing 3g antennas as a primary antenna may experience this degradation
Fuel System, Diesel 2021-09-21 · 43-071 · Service Bulletin/Repair Instructions
fix-as-fail â 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 disab
Showing the 6 most recent of 19 bulletins. Search all of them free at nhtsa.gov.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.