Problems owners report
Complaints filed with NHTSA about the 2011 Kenworth T800, by the system named in each complaint. One complaint can name several.
- Service brakes1
NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 0 injuries and 0 deaths reported
Compared with other years
NHTSA ODI complaints by model year
New York safety inspections
At its first New York inspection the 2011 Kenworth T800 failed the safety check 0.48% of the time — 81% less often than the average 2011 passenger car (2.49%). Median odometer at inspection: 190,811 miles.
NY DMV Vehicle Inspections (vezn-fmmk), initial inspections since Aug 2021 · how we count
Recalls in Canada
11 Transport Canada recalls for the 2011 Kenworth T800.
| 2020148 7 Apr 2020 | Lights And Instruments 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 drive… |
| 2015211 15 May 2015 | Engine On certain vehicles equipped with Cummins Westport ISL-G engines, excessive engine crankcase pressure could cause the vent tube assembly elbow to detach from t… |
| 2015190 8 May 2015 | Electrical On certain vehicles, water could migrate into wiper motor head and could lead to internal corrosion. This internal corrosion could form a conductive salt bridg… |
| 2011263 21 Jul 2011 | Powertrain 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… |
| 2011130 24 Mar 2011 | Engine 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 f… |
| 2011105 7 Mar 2011 | Brakes 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 … |
| 2011087 25 Feb 2011 | Engine 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 … |
| 2010372 28 Oct 2010 | Brakes 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… |
| 2010329 4 Oct 2010 | Engine On certain vehicles, the exhaust gas recirculation (EGR) oil seal installed on the output shaft of the valve actuator may delaminate, possibly allowing engine o… |
| 2010324 29 Sept 2010 | Electrical On certain vehicles, one of the harness spade terminal connections to the chassis load center may become completely unseated. An unseated connection may result… |
| 2010150 10 May 2010 | Brakes On certain trucks, the air governor was assembled with a blank plug instead of a breather. Without the breather, the air governor may not be able to detect the… |
Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada
Recalls
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."
PACCAR Incorporated (PACCAR) is recalling certain 2008-2019 Peterbilt 330, 335, 337, 340, 348, 365, 367, 384, 386, 387, 388, 389, 567, 579 and 587 vehicles and 2008-2020 Kenworth T170, T270, T370, T660, T680, T800, T880, and W900 vehicles equipped with NAMUX Software. In the event that the Anti-lock Brake System (ABS) loses battery and/or ignition power to the controller, the dash warning light for the ABS may not illuminate to warn the driver of the loss of ABS. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, "Air Brake Systems," and 136, "Electronic Stability Control System on Heavy Vehicles."
PACCAR Incorporated (PACCAR) is recalling certain model year 2010-2016 Kenworth T440, T800, and W900 trucks manufactured August 31, 2009, to April 20, 2015, and 2008-2015 Peterbilt 320, 337, 348, 365, 382, and 384 trucks manufactured July 27, 2007, to April 28, 2015, and equipped with certain Cummins Westport ISL G engines. Excessive engine crankcase pressures may cause the 90-degree elbow of the vent tube assembly to detach from the crankcase ventilation breather, possibly allowing engine oil to come into contact with hot surfaces.
PACCAR Incorporated (PACCAR) is recalling certain model year 2011-2016 Kenworth T270, T370, T440, T470, C500, C540, C550, T660, T800, W900, and 963 trucks manufactured November 1, 2010, to April 6, 2015. In the affected trucks, water may leak into the wiper motor.
PACCAR is recalling certain model year 2007-2014 Kenworth T800 and W900 trucks manufactured March 22, 2006, through July 15, 2013 and equipped with Primaax tridem rear suspensions and a pusher and/or tag axle. The affected trucks have brake chambers that take longer to apply or release the brakes than the required time limit. Thus, these vehicles fail to conform to the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 121, "Air Brake Systems."
PACCAR IS RECALLING CERTAIN MODEL YEAR 2011-2012 KENWORTH T660, T700, AND T800 VEHICLES MANUFACTURED FROM APRIL 19, 2010, THROUGH MAY 13, 2011, AND MODEL YEAR 2008, 2010, AND 2011 PETERBILT 365, 367, 384, 386, 387, 388 AND 587 VEHICLES MANUFACTURED FROM APRIL 20, 2010, THROUGH JUNE 11, 2011, AND EQUIPPED WITH PACCAR MX ENGINES AND EATON ULTRASHIFT DM OR ALLISON AUTOMATIC TRANSMISSIONS (WITHOUT AUTO-NEUTRAL). THE FAST IDLE CONTROL MAY BE ACTIVATED BY THE OPERATOR WHILE THE TRANSMISSION IS IN GEAR.
PACCAR IS RECALLING CERTAIN MODEL YEAR 2011-2012 KENWORTH T270/370, T440/T470, T800, T660, W900 AND C500 VEHICLES MANUFACTURED BETWEEN OCTOBER 18, 2010, AND JANUARY 28, 2011. CERTAIN CAST IRON SLACK ADJUSTER HOUSINGS, WHICH TRANSMIT BRAKING FORCE FROM THE BRAKE CHAMBER PUSH ROD TO THE BRAKE CAM TUBE, MAY INCLUDE A FLOW NOTCH IN THE HANDLE PORTION OF THE HOUSING DUE TO AN ERROR DURING THE CASTING PROCESS. A FLOW NOTCH IN THE HANDLE PORTION MAY REDUCE THE EFFECTIVE CROSS SECTION STRUCTURE AND CAUSE THE SLACK ADJUSTER HOUSING TO FRACTURE.
PACCAR IS RECALLING CERTAIN MODEL YEAR 2008-2012 KENWORTH T2000, T660, T700, T800, AND W900, AS WELL AS MODEL YEAR 2009-2012 PETERBILT 365, 367, 384, 386, 387, 388, 389, AND 587 TRUCKS EQUIPPED WITH PACCAR MX ENGINES. THE OIL MODULE CENTRIFUGAL SPINNER FILTER CAP IN THE PACCAR MX ENGINE MAY BECOME LOOSE, POSSIBLY ALLOWING THE CAP TO COME OFF AND ENGINE OIL TO PARTIALLY DISCHARGE FROM THE OIL MODULE ONTO EXHAUST COMPONENTS.
PACCAR IS RECALLING CERTAIN MODEL YEAR KENWORTH T660 AND T800 VEHICLES MANUFACTURED FROM SEPTEMBER 13, 2010, THROUGH NOVEMBER 19, 2010, FOR FAILING TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. PART 567, "CERTIFICATION." THE STEER AXLE GAWR AND GVWR RECORDED ON THE VEHICLE'S DOOR LABELS MAY BE INACCURATE AND OVERSTATE THE ACTUAL LOAD CAPACITY OF COMPONENTS INSTALLED ON THE VEHICLE.
PACCAR IS RECALLING CERTAIN MODEL YEAR KENWORTH T660, T700, T800 AND W900 VEHICLES MANUFACTURED FROM DECEMBER 22, 2008, THROUGH AUGUST 2, 2010, AND EQUIPPED WITH AG400L AIR DISC BRAKES. THE AIR DISC BRAKE CALIPER COULD BE INSTALLED ON THE WRONG SIDE OF THE DRIVE AXLE POTENTIALLY CAUSING INTERFERENCE WITH THE SUSPENSION BRACKET AND THE REAR SUSPENSION AS THE OUTERMOST BRAKE PADS WEAR AND THE FLOATING CALIPER MOVES INBOARD.
PACCAR IS RECALLING CERTAIN MODEL YEAR KENWORTH AND PETERBILT VEHICLES. A MANUFACTURING DEFECT IN THE SEAL SUPPLIED BY A COMPONENT MANUFACTURER INSTALLED ON THE OUTPUT SHAFT OF THE EXHAUST GAS RECIRCULATION (EGR) VALVE ACTUATOR MAY CAUSE EVENTUAL DELAMINATION OF THE SEAL. DELAMINATION OF THE SEAL MAY ALLOW ENGINE OIL TO LEAK FROM THE EGR VALVE ONTO EXHAUST COMPONENTS.
KENWORTH IS RECALLING CERTAIN MODEL YEAR 2011 T660, T800, W900, C500, T440, AND T470 VEHICLES MANUFACTURED FROM APRIL 1, 2009, THROUGH AUGUST 30, 2010. ONE OF THE FOUR HARNESS SPADE TERMINAL CONNECTIONS TO THE CHASSIS LOAD CENTER MAY BECOME COMPLETELY UNSEATED. A COMPLETELY UNSEATED CONNECTION MAY RESULT IN A POWER LOSS TO A PORTION OF THE VEHICLE'S EXTERIOR LIGHTING.
KENWORTH IS RECALLING CERTAIN MODEL YEAR 2011 T270, T370, AND T800 TRUCKS MANUFACTURED FROM JANUARY 28 THROUGH MARCH 19, 2010, EQUIPPED WITH DV-2 AIR GOVERNOR CONTAINING PART NUMBER G90-1070-2111111 ON THE T270/370 MODEL TRUCKS AND PART NUMBER G90-1070-11113111 ON THE T800 MODEL TRUCKS. THE DV-2 AIR GOVERNOR WAS MISASSEMBLED WITH A BLANK PLUG INSTEAD OF A BREATHER. WITHOUT THE BREATHER INSTALLED, THE AIR GOVERNOR MAY NOT BE ABLE TO DETECT THE LOSS OF AIR PRESSURE IN THE AIR SYSTEM DURING NORMAL USE. THIS CONDITION MAY RESULT IN THE SLOW ACTIVATION OF THE EMERGENCY SPRING BRAKES.
Whether a recall was fixed on a particular car is known only to the manufacturer: check the VIN at nhtsa.gov/recalls.
NHTSA recalls · summaries in NHTSA's own words
Service bulletins
What Kenworth told its dealers about the 2011 Kenworth T800: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 10254164 | Certain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air volume requirements per FMVSS/CMVSS 121 Air Brake Systems. This bulletin will be updated when repair parts and procedures are available. |
| 10188550 | Information Only Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter. |
| 10186161 | Eaton ultrashift plus excessive engine over-speed lamp on. |
| 10177021 | Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information. |
| 10173212 | Information Only Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead to water intrusion and corrosion in some vehicles. |
| 10173205 | Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage. |
| 10169787 | Information Only - Vehicles built with NAMUX software from 2013 to present may experience accuracy issues with the tachometer. The issue can be temporarily resolved using any one of the included procedures. |
| 10168703 | Information Only: This bulletin provides guidance for repairing an air-conditioning system after internal failure of the A/C compressor. |
| 10165583 | Information Only This bulletin provides information about the California Air Resources Board (CARB) Periodic Smoke Inspection Program (PSIP) and Heavy Duty Vehicle Inspection Program (HDVIP). |
| 10092232 | FIX-AS-FAIL - ENGINE OVER-SPEED LAMP COULD COME ON AFTER A DOWNSHIFT WITH THE EATON ULTRASHIFT PLUS TRANSMISSION. THIS DOES NOT AFFECT THE FUNCTION OF THE VEHICLE. |
| 10056911 | KENWORTH: SOME TRUCKS FAILED TO MEET COMPANY STANDARDS FOR AIR VOLUME LIFT AXLE AND THE COMPANY WILL INCREASE AIR VOLUME FOR WORTHWHILE IMPROVEMENT TO EXCEED GOVERNMENT FMVSS 121. MODEL T800, W900. *PE |
| 10055926 | KENWORTH: PROCEDURAL INFORMATION PROVIDED REGARDING THE REPLACEMENT OF HOOD WHERE THERE ARE DAMAGED HOOD POCKETS. MODEL T800. *PE |
| 10051834 | MX RC5-RC14 SOFTWARE UPDATE CAMPAIGN. SOFTWARE UPDATES ARE SAID TO BENEFIT THE ENGINES IN RC5 AND RC14 KENWORTH ENGINES. PACCAR/KENWORTH. *KB |
| 10048500 | KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. TRANSMISSION DOES NOT AUTOMATICALLY UPSHIFT WHEN HIGH IDLE SPEED OF ENGINE IS EXCEEDED DUE TO LACK OF PROPER CALIBRATION OF TRANSMISSION FOR-ENGINE. MODELS 2010-2012 T660, T700 AND T800. *PE |
| 10048419 | KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SPECIFIC PRODUCT IMPROVEMENT ELEMENTS ARE DESCRIBED IN BULLETIN FOR CHASSIS BENEFITING FROM ENGINE SOFTWARE UPDATES. MODELS 2010-2012 T660, T700, T800, W900. *PE |
| 10045242 | KENWORTH: DIAGNOSTICS INDICATE FAILED FUEL LEVEL SENSOR FUNCTION IN REPAIRS AND BEFORE COMPONENT IS REPLACED, DIAL FACE SHOULD BE CLEANED AND FAILURE VERIFIED. ALL KENWORTH MODELS WITH OHM DIAL OR OPEN CARD STYLE FUEL SENDERS. *PE |
| 10045240 | KENWORTH: OIL COLLECTION AT CAC INTAKE PIPE IS CAUSED BY AN IMBALANCE IN TURBOCHARGER PRESSURES. MODELS T660, T800, T700, AND W900. *PE |
| 10044799 | KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. LINE FATIGUE FAILURE MAY BE DUE TO EXCESSIVE VIBRATIONS OF HIGH PRESSURE FUEL LINES AND DIESEL FUEL LEAK AND MALFUNCTION INDICATOR LAMP. *PE |
| 10044761 | KENWORTH: DUE TO LOSS OF POWER AND HIGH FAILURE RATE, THE VALVES WILL BE REPLACED IN THE ENGINE FUEL CONTROL. MODELS T600, T700, T800 AND W900. MODEL YEAR 2011. *PE |
| 10044285 | KENWORTH (PACCAR): ENGINE SOFTWARE UPDATE REQUIRED FOR INSTALLATION OF HC DOSER SHIELDS AND/OR EGR CLEANING FOR CHASSIS. *PE |
| 10044145 | KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE CHASSIS MAY NOT HAVE THE PROPER ASSEMBLY CONTROLS IN PLACE FOR DRAGLINK CONNECTIONS TORQUE. MODELS C500, K500, T660, T800 AND W900 2011-2012. *PE |
| 10044093 | KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON CERTAIN TRUCKS, ON THE CHASSIS, CERTIFIED CLEAN IDLE DECALS WERE MISTAKENLY INSTALLED AND NEED TO BE REMOVED. *PE |
| 10044092 | KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON CERTAIN CHASSIS, THE TRANSMISSION TEMPERATURE FAILS TO BE ON THE NAVPLUS DRIVER DISPLAY AND CERTAIN CAUTIONS AND WARNINGS APPROPRIATE FOR HIGHWAYS NEEDS TO BE DISABLED FOR RESIDENTIAL AREAS. *PE |
| 10043876 | KENWORTH: THE STANDARD PRODUCTION COMPONENTS ARE REPLACING THE PRE-PRODUCTION COMPONENTS. *PE |
| 10043743 | KENWORTH: ENGINE CONTROL UNIT (ECU), IDENTIFIED AS PMCI IN ENGINE RAPIDO, SHOULD HAVE A PROTECTIVE SHIELD FOR SOFTWARE UPDATES AND THE HC DOSER FITTING INSTALLED FOR AFTER AFTERTREATMENT CONTROL UNIT. *PE |
NHTSA manufacturer communications (public domain)