Safe to driveUntil the next service
J1939 code SPN 533. Below — how the fault is worded at the factory by KAMAZ, MAZ and YaMZ, and what the second half of the code (FMI) means in the standard.
| FMI 15 | ⚠ Crankshaft speed exceeds maximum (see "critical" section) |
| FMI 15 | Crankshaft speed exceeded the maximum allowed - Overspeed detected. Blink code: 2-2-6. Repair: If the overspeed was caused by shifting down from a higher gear and the engine is in order, you can keep driving. If the engine revved up on its own, do not start it — contact a service centre immediately. |
| FMI 15 | Maximum allowable crankshaft speed exceeded (Overspeed detected). Blink code: 2-2-6. Repair: If the overspeed was caused by shifting down from a higher gear and the engine is in order, you can keep driving. If the engine revved up on its own, do not start it — contact a service centre immediately. |
| SPN 533 FMI 15533/15 · 533.15 | above normal — low severity |
Safe to drive. Below — how much time you have and what happens if you keep going.
A standalone fault with no immediate consequences for driving.
Show the codes at the next service. If a second code from the same system appears, stop putting it off.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.