Safe to driveDrivable, but watch it yourself
SPN 523623 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 and YaMZ, and what the second half of the code (FMI) means.
| FMI 3 | CAN: DM1DCU timeout |
| FMI 3 | CAN message DM1DCU error - CAN bus message timeout. Blink code: 4-6-6. Repair: Contact a service centre. |
| FMI 3 | DM1DCU CAN message fault (CAN bus message timeout). Blink code: 4-6-6. Repair: Contact a service centre. |
| SPN 523623 FMI 3523623/3 · 523623.3 | voltage above normal or shorted high |
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.