AI Damage2016 Caterpillar CT660: common problems
The maker issued 34 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 34
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine | 0 | 0 | 15 |
| Electrical system | 0 | 0 | 5 |
| Engine and cooling | 0 | 0 | 4 |
| Equipment | 0 | 0 | 2 |
| Powertrain | 0 | 0 | 2 |
| Structure | 0 | 0 | 2 |
| Fuel system | 0 | 0 | 1 |
| Suspension | 0 | 0 | 1 |
| Visibility | 0 | 0 | 1 |
| Wheels | 0 | 0 | 1 |
Comparison
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.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
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 with certain truck models that were built with 2013 through 2015 model year CT13 heavy duty on board diagnostic (HDOBD) engines. These engines will require recalibration of the engine ECM and ACM…
- Sheppard Gearbox and Power Steering Pump Specifications Are Now Available - Specification charts are now…
Sheppard Gearbox and Power Steering Pump Specifications Are Now Available - Specification charts are now available for Sheppard power steering gearboxes and power steering pumps on the above listed machines. Table 1 is…
- Body and Chassis Paint Guidelines - This general field guideline applies to all CT660 Vocational Trucks…
Body and Chassis Paint Guidelines - This general field guideline applies to all CT660 Vocational Trucks for paint/body inspection.
- CT11 and CT13 Valve Cover Bolts - The valve covers on the CT11 and CT13 engines contain bolts that have…
- Rear Axle Alignment Specifications - The following tables display rear axle alignment specifications and…
Rear Axle Alignment Specifications - The following tables display rear axle alignment specifications and target values. Use the target values when readjusting the rear axle alignment.
- CT11, CT13, and CT15 Cooling System Flush After Oil Cooler - In the event of an oil cooler failure, engine…
CT11, CT13, and CT15 Cooling System Flush After Oil Cooler - In the event of an oil cooler failure, engine oil may have entered the cooling system and mixed with the engine coolant. This special instruction contains…
- SART Module Diagnostic Procedure for Certain On Highway Trucks - The technician may notice that a code…
SART Module Diagnostic Procedure for Certain On Highway Trucks - The technician may notice that a code below is active or inactive. The customer might not mention a warning light for this code alone. Diagnostic…
- CT660 Instrument Gauge Cluster - Gauges, including speedometer, tachometer, transmission oil temperature,…
CT660 Instrument Gauge Cluster - Gauges, including speedometer, tachometer, transmission oil temperature, and others are reading erratically or having incorrect values. These gauges are all part of the primary cluster…
- CT660 Vision Link "Ghost Codes" Instrument Cluster Generated Codes - Ghost codes show up on Vision Link,…
CT660 Vision Link "Ghost Codes" Instrument Cluster Generated Codes - Ghost codes show up on Vision Link, but not on the ECM's. The gauge cluster can generate some fault codes. The only way to read these codes are on…
- A/C Refrigerant Quantity Is Incorrect for CT660 On Highway Trucks - In table 14 in chapter 6 of System…
A/C Refrigerant Quantity Is Incorrect for CT660 On Highway Trucks - In table 14 in chapter 6 of System Operation, Disassembly and Assembly, and Specifications, UENR1844-01 the refrigerant quantity is incorrect. The…
- There is a problem which relates to engine emissions on certain CT660, CT680, and CT681 On Highway Trucks…
There is a problem which relates to engine emissions on certain CT660, CT680, and CT681 On Highway Trucks that were built with 2016 model year compliant CT13 Engines. This recall will require recalibration of the…
- EXCESSIVE ENGINE OIL CONSUMPTION ON CT13 ENGINES WITH SCR - ON CERTAIN CT13 ENGINES WITH SCR, CARBON CAN…
EXCESSIVE ENGINE OIL CONSUMPTION ON CT13 ENGINES WITH SCR - ON CERTAIN CT13 ENGINES WITH SCR, CARBON CAN BUILD UP ON THE TOP LANDS OF THE PISTONS AND CAUSE THE PISTON RINGS TO STICK, LEADING TO LOSS OF OIL CONTROL IN…
NHTSA lists 34 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2016 Caterpillar CT660?
There are no owner complaints in the NHTSA data for this year; the data comes from 34 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2016 Caterpillar CT660?
NHTSA lists 34 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2016 Caterpillar CT660 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2016 models
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.