Kenworth T660 recalls

• Steering#2022210April 25, 2022

  985 units affected

  Issue: On certain trucks, the fasteners that attach the steer arm to the steering knuckle may fail. If this happens, the steer arm could separate from the steering knuckle and cause a loss of steering control. Note: This recall only affects trucks equipped with a Dana D-series steer axle. Safety Risk: A loss of steering control could increase the risk of a crash. Corrective Actions: PACCAR will notify owners by mail. The corrective actions for this recall are under development.

• Lights And Instruments#2020148April 7, 2020

  65,284 units affected

  Issue: On certain trucks, the warning light for the tractor anti-lock brake system (ABS) may not turn on if the system loses power. If this happens, the driver will not get warning that the ABS is not working properly. Note: This problem would also cause the traction control (TC) and electronic stability control (ESC) lights not to turn on. Safety Risk: If a driver is not warned that the ABS is not working properly, there could be an increased risk of a crash. Corrective Actions: PACCAR will notify owners by mail and instruct you to take your truck to a dealer to update the software for the cab control module (CECU).

• Powertrain#2018739December 24, 2018

  2,634 units affected

  On certain vehicles equipped with an Eaton automated manual transmission and electronic clutch actuator (ECA), the clutch may have been manufactured improperly and could fail. If this occurs, the broken clutch components could prevent the transmission from disengaging or shifting to neutral. This could result in unintended vehicle movement, even if the parking brake is applied, increasing the risk of a crash causing injury and/or damage to property. Correction: Dealers will recalibrate the Transmission Control Module (TCM).

• Fuel System#2018527September 25, 2018

  2,974 units affected

  On certain trucks built with a Cummins X15 or ISX15 engine equipped with nylon fuel lines and a banjo bolt on the fuel pump, a blockage in the fuel cooling system may cause a fuel line to burst. This could result in a significant fuel leak onto the roadway, which would create a road hazard for other motorists. Additionally, this condition could also cause an engine stall without warning, without the ability to restart the engine. Both of these conditions may increase the risk of a crash causing injury and/or damage to property. Correction: Cummins-authorized dealers will replace the affected nylon line with a steel line.

• Electrical#2018442August 23, 2018

  4,186 units affected

  On certain trucks with an ISX15 engine and a 1.9 M cab, the engine wiring harness is missing circuits to allow the illumination of Check (CEL) and Stop (SEL) Engine Lamps and sounding of the Stop Engine Alarm. A failure to notify the operator of a serious engine problem may result in an engine failure without warning, and loss of motive power while the vehicle is in motion, which could increase the risk of a crash causing injury and/or property damage. Correction: Dealers will inspect and/or test the engine harness for the missing circuits, and if found missing, an overlay jumper harness will be installed.

• Brakes#2018389July 24, 2018

  214 units affected

  Certain vehicles may fail to conform to the requirements of Canada Motor Vehicle Safety Standard (CMVSS) 121 - Air Brake Systems and CMVSS 136 - Electronic Stability Control Systems for Heavy Vehicles. In the event that the anti-lock brake system (ABS) loses battery and/or ignition power to the controller, the ABS indicator lamp may not illuminate to warn the driver of the loss of ABS, which is contrary to the requirements of the standards. This could result in the loss of ABS function with no warning to the driver, which could increase the risk of a crash causing injury and/or damage to property. Correction: Dealers will reprogram the cab control module.

• Steering#2017461September 25, 2017

  281 units affected

  On certain vehicles, the castellated nut and cotter pin on the steer axle may not have been tightened to specification. This could cause the tie rod to become loose in the steer axle, which would result in audible noise and/or looseness in steering. If the vehicle were continued to be operated in this condition, the tie rod could disconnect from the knuckle, resulting in a complete loss of control of a vehicle wheel, which would increase the risk of a crash causing injury and/or damage to property. Correction: Dealers will inspect the torque of the castellated nuts on the tie rod, and replace the tie rod stud and knuckle as necessary.

• Engine#2016289June 8, 2016

  178 units affected

  On certain vehicles, the Engine Control Module (ECM) may develop an internal electrical short circuit that could blow a fuse in the ECM's electrical supply circuit. This could cause the engine to stall without warning and prevent the vehicle from being restarted. Engine stalling without warning would result in lost propulsion which, in conjunction with traffic and road conditions, and the driver's reactions, could increase the risk of a crash causing property damage and/or personal injury. Correction: Dealers will replace the ECM.

• Engine#2015418September 23, 2015

  9 units affected

  On certain vehicles equipped with a Cummins engine, the Engine Control Module (ECM) could develop an internal electrical short circuit that could blow a fuse in the ECM’s electrical supply circuit. This could result in an unexpected engine stall without the ability to restart the engine, which could increase the risk of a crash. Correction: Dealers will replacing the existing, affected ECM with a new ECM.

• Brakes#2015318July 20, 2015

  32 units affected

  Certain vehicles fail to comply with the requirements of Canada Motor Vehicle Safety Standard 121 - Air Brake Systems. The two service brake connections of the SR-7 spring brake valve assembly that provide the valve with feedback from the primary and secondary service brake applications may have been reversed during installation. Although the SR-7 valve would still function properly if there were normal reservoir pressure, in the event of a failure in the primary or secondary circuit, the redundant circuit would not provide adequate service brake functionality, and the vehicle would fail to meet the emergency brake system performance standard. This could result in reduced braking performance which could result in a vehicle crash. Correction: Dealers will inspect, remove and reconnect the air lines to the correct port of the SR-7 valve.

• Lights And Instruments#2015316July 20, 2015

  4,791 units affected

  Certain vehicles equipped with HID headlamps may not comply with the requirements of Canada Motor Vehicle Safety Standard 108 - Lighting System and Retroreflective Devices. A Daytime Running Lamp (DRL) that is optically combined with a turn signal lamp must switch off when the turn signal lamp is switched on as a hazard warning signal. In the affected vehicles, the DRL overrides the hazard flashing functionality after the service brake is applied for more than 2 seconds, which is contrary to the standard. The hazard functionality returns to normal when the application of the service brake is removed. Turn signal functionality would not impacted. Failure to warn oncoming vehicles with flashing hazard lamps could increase the risk of a crash causing injury and/or damage to property. Correction: Dealers will update vehicle software.

• Electrical#2015190May 8, 2015

  22,815 units affected

  On certain vehicles, water could migrate into wiper motor head and could lead to internal corrosion. This internal corrosion could form a conductive salt bridge which could result in a short circuit, causing the wiper system to fail. Loss of windshield wiping capability, should it occur during a rainy/snowy day, may compromise the driver's ability to see the road and its users, and a short circuit could increase the risk of fire, which could result in injury and/or damage to property. Correction: Dealers will install a shield over the wiper motor to protect it from water intrusions and prevent corrosion.

• Electrical#2015189May 8, 2015

  140 units affected

  On certain vehicles equipped with PACCAR MX-13 engines and Delco-Remy 40SI alternators, the alternator charge cable may chafe against an air conditioning discharge line. This chafing could lead to damage of the alternator cable's insulation and could lead to an electrical short, increasing the risk of fire, which could result in injury and/or damage to property. Correction: Dealers will rotate the alternator cable end 180 degrees to provide necessary clearance and reattach the cable to the alternator.

• Wheels#2015188May 8, 2015

  3 units affected

  On certain vehicles, the wheel nuts may have been insufficiently tightened during vehicle assembly. This could cause the wheel nuts to loosen and could lead to a complete separation of the wheel(s) from the vehicle, increasing the risk of a crash causing injury and/or damage to property. Correction: Dealers will inspect, and properly tighten the lug nuts to specification.

• Brakes#2015037January 28, 2015

  11 units affected

  On certain vehicles equipped with a Wabco quick release with double check valves, used to control park/spring brake application, the valve may leak internally. This could cause unintended partial or full park/spring brake application, which could affect service brake function and increase the risk of a crash causing injury and/or damage to property. Correction: Dealers will affect repairs.

• Brakes#2014590December 23, 2014

  218 units affected

  On certain vehicles, brake chamber diaphragm(s) may not be properly seated. This could lead to brake drag, causing brake overheating or unintended spring brake application. These issues could increase the risk of a crash causing injury and/or property damage. Correction: Dealers will replace the brake chambers.

• Electrical#2014512November 7, 2014

  388 units affected

  On certain vehicles, an undersized wire in the trailer stop lamp circuit of the instrument panel harness is susceptible to thermal cycling which may cause damage to the wiring. This could result in the trailer lamp fuse failing, which could cause stop lamps to become inoperative and increase the risk of a crash. This damaged wiring could also increase the risk of fire. These issues could result in injury and/or damage to property. Correction: Dealers will replace the undersized wire in the harness.

• Engine#2014046February 19, 2014

  82 units affected

  On certain vehicles equipped with Cummins ISL G or ISX12 G engines, incorrect engine ECU programming could cause the exhaust system temperature to become elevated during cold weather operation. This could also cause flames to be emitted from the exhaust. As a result, nearby combustible material could be ignited, increasing the risk of a fire, injury and/or damage to property. Correction: Authorized Cummins service facilities will update software programming.

• Seats And Restraints#2014020January 24, 2014

  1,646 units affected

  On certain vehicles, the seat belts may not comply with Canada Motor Vehicle Safety Standard 209 - Seat Belt Assemblies. Due to a defect in manufacturing, the seat belt buckle may not release as required by the standard. This could hinder egress from the vehicle in an emergency, increasing the risk of injury. Correction: Dealers will inspect and, if necessary, replace affected seatbelt buckles.

• Lights And Instruments#2013432December 5, 2013

  702 units affected

  The stop/turn/tail lights used on certain vehicles may not comply with the requirements of Canada Motor Vehicle Safety Standard (CMVSS) 108 - Lighting System and Retroreflective Devices. The plastic lamp housing may shrink, causing the light to fall out of the light retention ring . In this situation, the light would no longer comply with the mounting requirements of CMVSS 108 and visibility to other motorists would be affected. This could increase the risk of a crash causing property damage and/or personal injury. Correction: Dealers will replace affected lights.

• Electrical#2013178May 24, 2013

  255 units affected

  On certain trucks, an internal defect in the ignition switch can cause the starter to engage when the key is partially inserted. This would allow the engine to start unexpectedly, which could injure someone working in the engine compartment. Also, manual transmission vehicles without the neutral start option may move unexpectedly if the transmission is in gear at the time the key is inserted. This could result in a crash causing property damage and/or personal injury. Correction: Dealers will inspect and, if necessary, replace the ignition switch assembly.

• Suspension#2013034January 31, 2013

  24 units affected

  On certain trucks equipped with an air suspension dump valve option, a software error could cause the rear suspension to reinflate without warning when the operator turns the key to the "off" position. The unexpected re-inflation of the suspension could result in physical injury to a person near the rear suspension. Correction: Dealers will reprogram vehicles with updated software.

• Brakes#2012027January 27, 2012

  1,434 units affected

  On certain trucks equipped with Bendix ATR-6 Antilock Traction Relay valves, in extremely cold conditions (at or below -18 degrees Celsius), internal ATR valve leakage can occur. This could cause unintended brake application, which could overheat the affected brakes and cause a fire. Also, in certain low traction conditions, unexpected brake application can cause a loss of vehicle control and a crash. These issues could result in property damage and/or personal injury. Correction: Dealers will update the cover assembly on the ATR valves.

• Powertrain#2011263July 21, 2011

  23 units affected

  On certain trucks equipped with a PACCAR MX engine and Eaton Ultrashift DM or Allison automatic transmission (without auto-neutral), the Fast Idle Control (also known as high idle) may be activated by the operator while the transmission is in gear. This could override the parking brake, allowing the vehicle to move unexpectedly. Unintended vehicle movement could result in a crash causing property damage and/or personal injury. Correction: Dealers will update the engine control software.

• Other#2011235June 21, 2011

  2 units affected

  On certain trucks, the hood strut assembly may have been incorrectly manufactured and could fail. This could prevent the safety latch (designed to keep the hood open during servicing) from functioning as intended, allowing the hood to close unexpectedly, which could cause injury to someone working in the engine compartment. Correction: Dealers will inspect and, if necessary, replace the hood strut assembly.

• Engine#2011130March 24, 2011

  2,034 units affected

  On certain trucks equipped with a Caterpillar C15 diesel engine, the Diesel Particulate Filter (DPF) combustion tube may fail. This could result in a vehicle fire causing property damage and/or personal injury. Correction: Dealers will replace the DPF combustion tube.

• Brakes#2011105March 7, 2011

  64 units affected

  On certain vehicles, the slack adjuster housings may have been manufactured incorrectly, which could allow the housings to fracture and fail. As a result, the wheel brake to which the slack adjuster is attached would no longer function, which could increase vehicle stopping distances. Should a steer axle slack adjuster fail, it could also cause the vehicle to pull to one side during braking. Either problem could result in a crash causing property damage and/or personal injury. Correction: Dealers will inspect and, if necessary, replace the slack adjusters.

• Engine#2011087February 25, 2011

  589 units affected

  On certain vehicles equipped with a PACCAR MX engine, the oil module centrifugal spinner filter cap may become loose, possibly allowing the cap to come off and engine oil to partially discharge from the oil module onto nearby exhaust components. The discharge of engine oil onto hot exhaust components could result in a fire causing property damage and/or personal injury. Correction: Dealers will re-torque the oil module filter cap and install a secondary retention device on the secondary centrifugal spinner filter cap.

• Other#2011015January 11, 2011

  82 units affected

  On certain vehicles, the safety latch (designed to keep the hood open during servicing) may fail allowing the hood to close unexpectedly, which could cause injury to someone working in the engine compartment. Correction: Dealers will replace the dual latch magnets with a improved single magnet.

• Brakes#2010372October 28, 2010

  58 units affected

  On certain vehicles equipped with the AG400L suspension and air disc brakes, a caliper could be installed on the wrong side of the drive axle. This could cause interference with the suspension bracket and U-bolts as the outermost brake pads wear and the floating caliper moves inboard. As this interference gets larger, it prohibits the movement of the floating caliper, subsequently reducing the outer pad's pressure on the disc which can eventually lead to reduced braking performance and increasing the risk of a crash. Correction: Dealers will inspect and, if necessary, replace one drive axle brake caliper.

• Engine#2010329October 4, 2010

  59 units affected

  On certain vehicles, the exhaust gas recirculation (EGR) oil seal installed on the output shaft of the valve actuator may delaminate, possibly allowing engine oil to leak from the EGR valve onto exhaust components. Engine oil leaking onto hot exhaust components, such as when the engine is under significant load, may create the possibility of a fire which can result in personal injury or property damage. Correction: Dealers will replace the EGR valve.

• Electrical#2010324September 29, 2010

  755 units affected

  On certain vehicles, one of the harness spade terminal connections to the chassis load center may become completely unseated. An unseated connection may result in a power loss to a portion of the vehicle's exterior lighting, potentially inhibiting the visibility of the operator and/or detection of the vehicle in certain conditions, which could increase the risk of a crash. Correction: Dealers will inspect the harness and, if necessary, re-seat the female connectors on the male spade terminals.

• Steering#2010216June 30, 2010

  774 units affected

  On certain trucks, the weld around the steering shaft tube, which joins the splined tube to the non-splined intermediate tube, may be mislocated. An improperly located weld bead may allow the splined tube and non-splined tube to rotate relative one another during a low speed, high torque turn, resulting in a possible separation of the tubes. This could cause a loss of steering control which could result in a crash causing property damage and/or personal injury. Correction: Dealers will inspect and, if necessary, replace the steering shaft.

• Other#2010195June 10, 2010

  212 units affected

  On certain trucks, the retaining pins securing the hood strut tube to the hood strut assembly may become loose and fall out, allowing the lock tube to rotate on the strut assembly. In its normal operation, the safety latch feature is automatically set and prevents the hood from closing. If the retaining pins are missing, the lock tube may rotate relative to the hood strut and become a non-operational safety latch feature. A non-operational safety latch may not be detected by an operator, increasing the risk of personal injury and/or vehicle damage should the hood unexpectedly close. Correction: Dealers will replace the pivot disc and lock tube retaining pins with a revised pivot disc and cap screws.

• Suspension#2010142April 30, 2010

  27 units affected

  On certain vehicles, the rear axle outer end hub may have not been primed with oil properly during the rear axle installation process. Potential lack of oil may cause the outer end bearing to heat up and/or seize, possibly resulting in the overheating of the wheel end. As a result, a wheel end fire may occur, increasing the risk of a crash causing property damage, personal injury or death. Correction: Dealers will replace bearings, seals, and add oil to the outer end hubs. Races and axle housing will be inspected and replaced as necessary.

• Steering#2009368December 30, 2009

  721 units affected

  On certain vehicles, the fasteners attaching the steering gear to the front drive bracket may have received insufficient torque at assembly, resulting in less than the required clamp load. Insufficient clamp load may allow the fastener (s) to become loose and fall away from vehicle. If multiple fasteners were to become loose, the steering may wander resulting in possible loss of control which could result in a crash causing property damage, personal injury or death. Correction: Dealers will inspect fasteners, replace if necessary and torque them to specifications.

• Suspension#2009305October 22, 2009

  106 units affected

  On certain trucks, the rear axle u-bolts may have received insufficient tightening torque during vehicle assembly. This could allow the u-bolts to loosen over time, which may cause vibration in the rear suspension. If multiple fasteners were to become loose, the U-bolt holding the axle may lose clamp load and the rear axle may shift relative to the rear suspension drive beam, which might result in a crash causing personal injury or death. Correction: Dealers will tighten the axle u-bolts.

Canadian data updated August 24, 2026