Safe to driveUntil the next service
SPN 520223 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 20 | Service signal: high-pressure circuit test |
| FMI 20 | High-pressure test in progress - Test in progress, fuel high-pressure monitoring disabled. Blink code: 5-2-2. |
| FMI 11 | ECU internal monitoring reported a fault, computer monitoring level (MoC). Scan tool code: P060C. Effect: OBD limits torque immediately. |
| FMI 12 | Light switch pressed for more than 60 seconds. Switch damaged, or wiring between the LCM and the switch shorted to ground. |
| FMI 20 | High-pressure test in progress (Test running, fuel high-pressure monitoring disabled). Blink code: 5-2-2. |
| SPN 520223 FMI 11520223/11 · 520223.11 | root cause not known |
| SPN 520223 FMI 12520223/12 · 520223.12 | faulty device or component |
| SPN 520223 FMI 20520223/20 · 520223.20 | data drifted high |
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.