I drive a 2022 Kenworth T680 equipped with a Bendix collision mitigation / automatic emergency braking system. On multiple occasions, the system has applied the service brakes hard with no real obstacle in front of the truck, creating a serious rear‑end collision risk for vehicles behind me. The events typically occur in rain, fog, or under overpasses and signs at highway speeds with cruise control engaged. The truck suddenly brakes without warning or driver input, dropping speed rapidly in the travel lane while traffic is following. I have documented dates, locations, weather, and traffic conditions for these incidents. In each case, there was no stopped or slowing vehicle in my lane that justified automatic emergency braking. This appears to be a “false positive” AEB activation similar to those the federal safety agency is already investigating on other Class 8 tractors, where the system misidentifies harmless objects or roadway features and commands an unnecessary stop. These false activations put me and other motorists at risk of a rear‑end crash. The dealer has indicated they are limited in how much they can disable the system for liability reasons, so I am submitting this as a safety defect report and requesting that the federal safety agency investigate this behavior on Kenworth T680 trucks with this collision mitigation system.
The worst 2022 Kenworth T680 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Brakes1
- Driver assistance1
- Engine1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Brakes1
- Driver assistance1
- Engine1
Recalls 10
Electrical system: propulsion system
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2022-2025 Peterbilt 520, 579, and 2021-2025 Kenworth T680 trucks. The high voltage (HV) contactors may open, causing a sudden loss of high voltage and a loss of drive power.
- Risk
- A loss of drive power increases the risk of a crash.
- Remedy
- Dealers will update the software and replace the electrical harness, free of charge. Owner notification letters were mailed May 13, 2025. Owners may contact Peterbilt's customer service at 1‑940‑591‑4220 and Kenworth's customer service at 1‑425‑828‑5888. PACCAR's numbers for this recall are 25PBC and 25KWC.
Recall number 25V181000 · Recall details
Electrical system: software
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2021-2025 Peterbilt and Kenworth vehicles, equipped with Bendix EC80 Advanced Electronic Control Units (ECU). Please see the recall report for a complete list of models. Electrical noise and low signal to the power line carrier may cause the ECU to incorrectly process commands or stop functioning.
- Risk
- Safety systems that depend on the ECU (Automatic Traction Control, ABS, Electronic Stability Control, Active Cruise Control, and Collison Mitigation System) may not function properly or at all, increasing the risk of a crash.
- Remedy
- Dealers will reprogram the ECU software, free of charge. Owner notification letters were mailed February 3, 2025. Owners may contact Kenworth's customer service at 1‑425‑828‑5888 and Peterbilt's customer service at 1‑940‑591‑4220. PACCAR's numbers for this recall are 24KWL and 24PBL.
Recall number 24V915000 · Recall details
Power train: automatic transmission: lever and linkage: column shift
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2021-2024 Peterbilt 365, 367, 389, 535, 536, 537, 548, 567, 579, and 2021-2025 Kenworth T180, T280, T380, T480, T680, T880 and W990 trucks. The right-hand gear shifter stalk connectors may have been improperly crimped, resulting in a loss of communication.
- Risk
- A loss of communication between the gear shifter and the transmission may result in the vehicle becoming disabled after coming to a stop, increasing the risk of a crash.
- Remedy
- Dealers will inspect and replace the gear shifter assembly as necessary, free of charge. Owner letters were mailed December 15, 2025, then phased after that. Owners may contact Kenworth customer service at 1‑425‑828‑5888 or Peterbilt customer service at 1‑940‑591‑4220. PACCAR's numbers for this recall are 24PBE and 24KWE.
Recall number 24V190000 · Recall details
Service brakes, air: supply: reservoir/tank
- What is wrong
- 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 Brake Systems."
- Risk
- Insufficient air volume can reduce braking performance and increase the risk of a crash.
- Remedy
- 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.
Recall number 24V145000 · Recall details
Electrical system: instrument cluster/panel
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2022-2023 Kenworth T680, T880, W990, and Peterbilt 365, 367, 389, 567, and 579 vehicles. The digital display may freeze and not display critical safety information. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard numbers 101, "Control and Displays" and 102, "Trans Shift Lever Seq/Starter Interlock/Trans Braking Effect."
- Risk
- The loss of display information, such as vehicle speed and warning lights, can increase the risk of a crash.
- Remedy
- Dealers will update the software, free of charge. Owner notification letters are expected to be mailed December 16, 2022. Owners may contact Kenworth's customer service at 1‑425‑828‑5888 and Peterbilt's customer service at 1‑940‑591‑4220. PACCAR's numbers for this recall are 22KWK and 22PBK.
Recall number 22V779000 · Recall details
Structure: underride
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2022-2023 Kenworth T680 tractor trailers. The mud flap may contact the fuel tank while the vehicle is in motion, creating wear on the fuel tank over time.
- Risk
- Excessive wear of the fuel tank may allow fuel to spill on the roadway, which can increase the risk of a crash or injury.
- Remedy
- Dealers will inspect the fuel tank and install an anti-sail device to prevent the mud flap from contacting the fuel tank, free of charge. Owner letters were mailed February 1, 2023. Owners may contact Kenworth's customer service at 1‑425‑828‑5888. Paccar's number for this recall is 22KWF.
Recall number 22V582000 · Recall details
Steering
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2022-2023 Kenworth T170, T270, T280, T370, T380, T440, T470, T480, T680, T800, T880, W900, W990, C500, and 2022-2023 Peterbilt 325, 330, 337, 348, 365, 367, 389, 520, 536, 537, 548, 567, and 579 vehicles. The steering gears may have been assembled incorrectly, which can cause the gears to fracture.
- Risk
- A fractured steering gear can cause a loss of steering control, increasing the risk of a crash.
- Remedy
- Dealers will inspect the steering gear serial numbers, and replace the steering gears as necessary, free of charge. Owner notification letters were mailed September 26, 2022. Owners may contact Kenworth's customer service at 1‑425‑828‑5888 and Peterbilt's customer service at 1‑940‑591‑4220. PACCAR's numbers for this recall are 22PBE and 22KWE.
Recall number 22V547000 · Recall details
Electrical system: wiring
- What is wrong
- 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.
- Remedy
- 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.
Recall number 21V00N000 · Recall details
Visibility: defroster/defogger/HVAC system
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2022 Kenworth T680, T880, and W990 vehicles. The HVAC controls may have insufficient soldering between the potentiometer(s) and the PCBA board, resulting in windshield defrost failure.
- Risk
- Inoperative windshield defrost may reduce driver visibility, increasing the risk of a crash.
- Remedy
- Dealers will replace HVAC control head, free of charge. Interim owner notification letters were mailed on September 17, 2021. Remedy parts are expected to be available mid-June, 2022. Owners may contact PACCAR's customer service at 1‑425‑828‑5888 (Kenworth). PACCAR's number for this recall is 21KWE.
Recall number 21V546000 · Recall details
Engine
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2021-2022 Kenworth T680, T880, W990, T800, W900 and Peterbilt 579, 567, 389, 367 vehicles equipped with a Cummins X15 engine. The capscrews that attach the flywheel to the crankshaft may have been improperly torqued, allowing the flywheel to detach.
- Risk
- A detached flywheel can cause loss of drive power, increasing the risk of a crash. Additionally, driveline pieces may be ejected from the engine compartment, increasing the risk of injury.
- Remedy
- PACCAR will notify owners, and dealers will properly torque the capscrews and the engine will also be inspected for damage and, if necessary, repaired, free of charge. The recall began on March 29, 2021. 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 21KWA and 21PBB.
Recall number 21V080000 · Recall details
Technical service bulletins for the 2022 Kenworth T680 96
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- KW & PB 14 fuel injector part numbers (seven for MX-11 and seven for MX-13 engines) have been added to...
- Fuel Injection Pump part number 2344776PEX for MX-13 engines has been added to this warranty policy.
- 24PBE_24KWE RH Shift Stalk Update Warranty section has been updated with revised verbiage for picture...
- The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector
- Replaced generic SRT codes with bulletin-specific SRT codes.
- The new 2.1m day cab lift tools, a Level 3 mandatory tool, are now available to order.
- Certain chassis equipped with an engine model year 2019
- RMI procedures have been updated to reduce the risk of progressive damage to the rocker arms
- Removed hyperlinks for bulletin migration
- Certain T680 Next Gen short hood chassis may be missing a bolt in the forward fairing.
What 2022 Kenworth T680 owners say
Most recent owner complaints, unedited.
The contact owns a 2022 Kenworth T680. The contact stated that while driving approximately 70 MPH, the Engine Control Module (ECM) or the Engine Control Unit (ECU), started to lose power, eventually displaying a black screen. When attempting to drive and accelerate up to 50 MPH, the vehicle suddenly lost power. The contact stated that a timer displayed a countdown from one hour, and once the timer reached 0 minutes, the vehicle automatically shut off. The contact would coast to the side of the road and wait before restarting the vehicle to continue driving. The vehicle was taken to the dealer, who diagnosed that the ECM/ECU and oxygen sensors both failed and needed to be replaced. The ECM/ECU was repaired. The manufacturer was not informed of the failure. The failure mileage was 450.
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Questions about the 2022 Kenworth T680
Is the 2022 Kenworth T680 reliable?
Owners have filed 2 complaints about the 2022 Kenworth T680, fewer than a typical T680 model year.
What is the most common problem with the 2022 Kenworth T680?
Brakes, with 1 complaint. Next is driver assistance (1).
How many recalls does the 2022 Kenworth T680 have?
10 recalls, covering electrical system, power train and service brakes, air.
Was there a recall on the 2022 Kenworth T680 brakes?
Yes, 1 recall: 24V145000. Check your VIN to see if your car still needs the free repair.
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