Safe to driveDrivable, but watch it yourself
SPN 520211 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by International, KAMAZ, MAZ, SITRAK, Volvo and YaMZ, and what the second half of the code (FMI) means.
InternationalKAMAZMAZSITRAKVolvoYaMZ
| FMI 7 | HVAC actuator position — Actuator position not responding |
| FMI 12 | CAN: EBC1 timeout (brake system) |
| FMI 12 | CAN message EBC1 error - CAN bus message timeout. Blink code: 4-4-1. Repair: Check the CAN line connection to the other CAN devices. |
| FMI 11 | Engine failed to start. Scan tool code: P0A0F. Effect: Torque limited, MIL on, power may drop to 60%. |
| FMI 3 | LCM output voltage is equal to or higher than the LCM supply voltage. Wire between the LCM and the relay shorted to the supply wire. |
| FMI 4 | LCM output voltage is below 2 V. Wire between the LCM and the relay shorted to ground. |
| FMI 12 | EBC1 CAN message fault (CAN bus message timeout). Blink code: 4-4-1. 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.