Safe to driveDrivable, but watch it yourself
SPN 520220 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by KAMAZ, MAZ, SITRAK, Volvo and YaMZ, and what the second half of the code (FMI) means.
| FMI 3 | CAN: TSC1-VR timeout |
| FMI 12 | CAN: TSC1-VR timeout |
| FMI 3 | CAN message TSC1-VR error - CAN bus active message timeout. Blink code: 4-2-5. Repair: Check the CAN line connection to the other CAN devices. |
| FMI 12 | CAN message TSC1-VR error - CAN bus inactive message timeout. Blink code: 4-2-5. Repair: Check the CAN line connection to the other CAN devices. |
| FMI 2 | ECU internal monitoring reported a fault, computer monitoring level (MoC). Scan tool code: P060B. |
| FMI 11 | ECU internal monitoring reported a fault, computer monitoring level (MoC). Scan tool code: P060B. |
| FMI 14 | ECU internal monitoring reported a fault, computer monitoring level (MoC). Scan tool code: P060B. |
| FMI 3 | Wiring between the LCM and the instrument panel shorted to the supply wire. |
| FMI 4 | Wiring between the LCM and the instrument panel shorted to ground. |
| FMI 3 | TSC1-VR CAN message fault (Active CAN bus message timeout). Blink code: 4-2-5. Repair: Check the CAN line connection to the other CAN devices. |
| FMI 12 | TSC1-VR CAN message fault (Inactive CAN bus message timeout). Blink code: 4-2-5. Repair: Check the CAN line connection to the other CAN devices. |
Safe to drive. Below — how much time you have and what happens if you keep going.
This is an electrical fault: an open, a short or a bad contact in the sensor circuit. The value it measures is most likely fine.
You can drive. But until the circuit is repaired this system runs blind and cannot warn you about a real failure.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.