If an error code appears while you are in the field, follow these standard operator procedures: Why Farmers Choose Valtra Tractors
Modern tractors are essentially rolling computers. Temporary communication glitches across the CAN bus can throw erroneous codes. Turn off the engine.
Valtra utilizes a standardized diagnostic trouble code (DTC) framework governed largely by the ISOBUS and SAE J1939 protocols used throughout the agricultural industry. When a control unit detects a reading outside of normal operational parameters, it generates a code composed of several parts. Code Structure valtra error codes
| Code | Description | Likely Cause | | :--- | :--- | :--- | | | CAN Bus Off (Network Down) | Wiring harness chafing, dead battery, faulty ECU. | | AL 801 | Alternator Voltage Low | Broken alternator belt, failing voltage regulator. | | AL 936 | Key ON without Brake | Safety interlock fault (operator presence switch). | | SPN 168 FMI 0 | Battery Voltage High | Overcharging alternator or jump-start error. |
e.g., Engine (EEM), Transmission (Transmission ECU), Hydraulics, or Cab Electronics. If an error code appears while you are
That single sentence can save hours of shop troubleshooting.
On newer S, N, and T series (2015+):
If a diagnostic trouble code reappears after you have reset it, it indicates a persistent underlying issue. In these cases, simply clearing the code will not fix the problem. Professional diagnosis is required to prevent further damage to the tractor's systems and components.