Skid Steer Fault Codes
Skid steer loaders and compact track loaders from CAT, Bobcat, John Deere, and Kubota -- the most-rented compact equipment in construction and landscaping. CAT D3 / D3 XE machines run C2.2, C3.3B, or C3.4B engines with J1939 SPN-FMI plus CAT-specific event codes. Bobcat hubs live separately since most current units share a Kubota V3800. This hub starts with CAT skid steers and compact track loaders; Bobcat / Deere / Kubota cross-link to their dedicated brand pages.
16 CAT skid steer codes· CAT / Bobcat / Deere / Kubota · Construction + landscape rental
Most Common CAT Skid Steer Fault Codes
Showing 16 of 16 CAT skid steer codes, sorted by severity. Each links to causes, diagnostics, and common fixes.
CAT-SKIDSTEER-100-1 critical
Engine Oil Pressure Below Safe Operating Threshold
CAT-SKIDSTEER-110-0 critical
Engine Coolant Temperature High Shutdown
CAT-SKIDSTEER-190-0 critical
Engine Overspeed Shutdown, ECM Cut Fuel
CAT-SKIDSTEER-5246-15 critical
Aftertreatment Inducement Severe Derate Active
CAT-SKIDSTEER-100-3 serious
Oil Pressure Sensor Voltage High Fault
CAT-SKIDSTEER-110-15 serious
Engine Coolant Temperature High Warning
CAT-SKIDSTEER-190-8 serious
Engine Speed Sensor Signal Erratic or Lost
CAT-SKIDSTEER-3251-15 serious
DPF Differential Pressure Too High Warning
CAT-SKIDSTEER-639-14 serious
J1939 CAN Bus Off Fault Detected
CAT-SKIDSTEER-HYDRAULIC-OIL-LEVEL-LOW serious
Hydraulic Reservoir Level Switch Reports Low Fluid
CAT-SKIDSTEER-HYDRAULIC-OIL-TEMP-HIGH serious
Hydraulic Oil Temperature Above Safe Limit
CAT-SKIDSTEER-PARK-BRAKE-FAULT serious
Park Brake Pressure Switch Fault, Drive Inhibited
CAT-SKIDSTEER-168-3 moderate
Battery / System Voltage Above Upper Limit
CAT-SKIDSTEER-168-4 moderate
System Battery Voltage Below Minimum Threshold
CAT-SKIDSTEER-1761-1 moderate
DEF Tank Level Below Warning Threshold
CAT-SKIDSTEER-SEAT-SWITCH-OPEN moderate
Operator Presence Seat Switch Reads Open
Skid Steer Brands
| Brand | Applications | Notes |
|---|---|---|
| Caterpillar | 226D3, 246D3, 262D3, 272D3 skid steers; 279D3, 289D3, 299D3 XE compact track loaders | CAT C2.2 / C3.3B / C3.4B engines with J1939 SPN-FMI plus CAT-specific E-codes (E1418, E2010, etc.). Read with CAT ET service tool. |
| Bobcat | S-series skid steers (S550, S650, S770), T-series CTLs (T595, T770, T870), E-series mini ex (covered separately) | See the dedicated Bobcat hub. Most current Bobcats run a Kubota V3800-CR-TIER4F. |
| John Deere | 316G / 318G / 320G / 324G / 332G skid steers, 317G / 325G / 333G CTLs | Yanmar 4TNV-engined. Codes via JD Service Advisor. |
| Kubota | SVL-65/75/95 compact track loaders, SSV-65/75 skid steers | Kubota V3307 / V3800 engines with E-codes via Diagmaster. |
Common Skid Steer Issues
- Hydraulic oil temperature high (HYDRAULIC-OIL-TEMP-HIGH) -- sustained loader work in hot weather, blocked oil cooler
- Engine coolant temperature high (110-0) -- debris on radiator screen, common during landscaping season
- DEF tank level low (1761-1) on Tier 4 Final units -- needs DEF top-up
- DPF differential pressure high (3251-15) -- short-cycle work prevents passive regen
- Battery voltage low (168-4) -- worn battery on rental fleet machines
- Operator seat switch open (SEAT-SWITCH-OPEN) -- safety interlock blocks function
- Park brake pressure fault (PARK-BRAKE-FAULT) -- hydraulic pressure issue or sensor failure