Service bulletins for the 2016 Kenworth T680
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
65 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
| 51012 | 2017-10-21. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Fix-as-Fail: CECU3 software P30-1011-139 software has been released. This software update is not mandatory. This software requires MY2017 PCC software when installed on MY2015/2016 vehicles equipped with PCC. |
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| 34-060 | 2017-10-12. Service bulletin. ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; TRAILER HITCHES. Non Safety Campaign: The circuit for the Trailer Hotline/Trailer Power may not be properly protected on Model T680/T880 vehicles equipped with this option. |
| 43-048 | 2017-10-12. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Fix-As-Fail: Repair for horizontal exhaust diffuser configurations with broken brackets or cracked diffuser. |
| 01-070 | 2017-04-10. Service bulletin. EQUIPMENT:MECHANICAL. FIX-AS-FAIL: KENWORTH T680/T880 HVAC PANEL AND TEMPERATURE MODE DOORS NOT FUNCTIONING PROPERLY |
| 16-038 | 2017-02-18. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. NON-SAFETY CAMPAIGN: WATSON & CHALIN LIFT AXLE FRAME BRACKETS WITH SLOTTED LOWER MOUNTING HOLES MAY EXHIBIT CRACKING WHEN FASTENERS ARE POSITIONED AT THE UPPER PORTION OF THE SLOT. INSTALLING A DOUBLER PLATE MAY PREVENT CRACKS FROM DEVELOPING. FOR VEHICLES WHERE CRACKING IS EVIDENT, A NEW UPDATED SIDE PLATE WILL BE INSTALLED. |
| 01-068 | 2017-02-18. Service bulletin. EQUIPMENT. FIX-AS-FAIL: AN INTERNAL ISSUE MAY CAUSE SOME HVAC MODE DOOR ACTUATORS TO FAIL. THIS WILL CAUSE THE HVAC SYSTEM TO ACT ERRATICALLY OR CONSTANTLY TURN ON AND OFF. |
| 27-026 | 2017-02-18. Service bulletin. ENGINE. 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. |
| 51-009 | 2017-02-18. Service bulletin. FUEL SYSTEM, OTHER. NON-SAFETY CAMPAIGN - POSSIBLE ASSEMBLY AND PROGRAMMING ISSUES WITH THE PCC SYSTEM MAY REDUCE THE FUEL SAVINGS BENEFIT OF PCC. |
| 51-008 | 2017-02-18. Service bulletin. EQUIPMENT. NON-SAFETY CAMPAIGN - INCORRECT PREDICTIVE CRUISE CONTROL (PCC) SPEED SIGNAL ON CUMMINS EQUIPPED T680 VEHICLES. |
| 51-007 | 2017-02-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. FIX-AS-REQUESTED - NAV+ HD SOFTWARE UPDATE FOR RANDOM REBOOT FIX AND MP3 FEATURES ENABLED. |
| 04-017 | 2017-02-17. Service bulletin. EQUIPMENT. FIX-AS-FAIL: THE HEAT-STAKE MOUNTING STUDS USED TO RETAIN THE FIXED PANEL COVER CAN FATIGUE. THIS COULD RESULT IN THE FORWARD CHASSIS FAIRING PANEL BECOMING LOOSE AND RATTLING. |
| 51-006 | 2017-02-17. Service bulletin. EQUIPMENT. NON-SAFETY CAMPAIGN - CHASSIS BUILT WITH PRE-PRODUCTION QV/VV MODELS OF THE NAV+ HD SYSTEM HARDWARE ARE ELIGIBLE FOR REPLACEMENT. THIS DOES NOT AFFECT THE OPERATION OF THE VEHICLE. |
| 43-047 | 2017-02-17. Service bulletin. STRUCTURE:BODY:DOOR. NON-SAFETY CAMPAIGN - GREENHOUSE GAS (GHG) HIGH AMBIENT TEMPERATURE EIST OVERRIDE SETTING IS NOT AS CUSTOMER REQUESTED. THIS CAUSES THE VEHICLE TO SHUT DOWN AT 65 DEGREES INSTEAD OF 80 DEGREES. THIS CHANGE REQUIRES THAT THE GHG LABEL IN THE DOOR BE REPLACED. |
| TT-7484-EN | 2016-01-09. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. ALLISON TRANSMISSION: ON SOME TRUCKS, THE PUSH BUTTON SHIFT SELECTOR (PBSS) SKIPS OIL LEVEL READING AND GOES DIRECTLY TO PROGNOSTICS AND COULD BE MISSING WIRE 116 ON BULKHEAD OTHER SIDE. MODELS T680, T880, 579, 567. *PE UPDATED 2/1/16. *PE |
| TIB-32-008 | 2015-08-25. Service bulletin. ENGINE; EQUIPMENT. KENWORTH: AN ULTRACAPACITOR ENGINE START MODULES (ESM), IN SOME TRUCKS, ARE NOT TREATED LIKE REGULAR BATTERY, DUE TO ELECTRICAL ENERGY STORAGE AND INTERNAL RESISTANCE IS EXTREMELY LOW AND ENERGY IS PROVIDED FASTER THAN BATTERY. MODEL T680, 880. NO YEARS LISTED. PE |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.