2014 Kenworth T680 Engine Problems
- Complaints
- 3about this part
- Share
- 30%of 10 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine of the 2014 Kenworth T680, 30% of the 10 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Apparently there is a failure of the fuel pump in most models of this cummins isx15 motor, tha when it does fail, shuts the truck down on highway, or worse, lik eit did to me....send metal shavings into the rest of the motor destroying the motor. There have been recalls for ceramic plungers, which I don't have...and recalls on many years this model was manufactured. …”
NHTSA complaint #11315835, filed 2020-03“A vibration is felt during warm up and becomes very noticeable after shifting into 8th gear. If the air compressor kicks in while the engine is below 1300 rpms this also increases the vibration , again real bad shifting into 8th and air compressor running .note: I just bought this truck from Kenworth sales company , salt lake city, ut I aint even put 2,000 miles on the truck, what kinda of deceitful ethics violations are practiced from this dealership?”
NHTSA complaint #11220806, filed 2019-06“Bunk wiring harness is shorting out causing truck to not be able to shut off with the key....and also causing problems with the def system....shops are telling us that there are trucks burning down from this faulty harness...and there has been a recall for this but Kenworth is not fixing this harness and expects the owner to fix it ....”
NHTSA complaint #11099334, filed 2018-06Related service bulletins
- 11037541Sep 11, 2026"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…
- 10096420Dec 22, 2016Non-safety campaign: replace the molded air intake pipe, which can crack and allow road debris into the engine. Debris entering through the intake may cause severe engine damage.
- 10186161Jul 28, 2016Eaton ultrashift plus excessive engine over-speed lamp on.
- 10092232Jul 28, 2016Fix-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.
- 10076109Apr 24, 2015Product improvements available front engine accessory drive (fead) update - improve the life of air conditioning com0ressor clutch bearing.
- 10056024Jun 30, 2014Kenworth: see document search button for owner letter. A max governed cc speed, on some trucks, was programmed incorrectly and limits maximum default speed to 63 mph.
Engine: other model years
Other parts of the 2014 Kenworth T680
4 complaintsElectrical system
2 complaintsTransmission and drivetrain
2 complaintsBrakes
1 complaintsElectronic stability control
1 complaintsFuel system
1 complaintsSteering
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2014 Kenworth T680
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology