AI DamageCaterpillar CT681: problems, complaints, bulletins
Summary for the Caterpillar CT681 across 2 model years: 0 owner complaints and 7 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine | 0 | 0 | 8 |
| Electrical system | 0 | 0 | 2 |
| Engine and cooling | 0 | 0 | 2 |
| Structure | 0 | 0 | 2 |
What to check before buying
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- There is a problem with certain truck models that were built with 2013 through 2015 model year CT13 heavy…
- There is a problem which relates to engine emissions on certain CT660, CT680, and CT681 On Highway Trucks…
- AFTERTREATMENT OUTLET NOX SENSOR INTERNAL WATER SHIELD INSTALLATION - WATER INTRUSION CAN CAUSE THE…
- CT11 AND CT13 CYLINDER HEAD CRACK INSPECTION GUIDE - CT11 AND CT13 CYLINDER HEADS ARE CRACKING IN THE FIELD
- EXTENDED LIFE COOLANT (ELC) EXHIBITING NITRITE DEPLETION IN MACHINES EQUIPPED WITH ALUMINUM…
- THE EXISTING EXHAUST FLEX PIPE CAN CRACK ON CERTAIN CT660, CT680, AND CT681 ON-HIGHWAY TRUCKS
- BATTERY CABLE REROUTE - DUE TO BATTERY CABLE ROUTING, THERE IS A CHANCE THAT BATTERY CABLE NEAR STARTER…
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.