Do not driveTo the nearest safe stop
J1939 code SPN 596. Below — how the fault is worded at the factory by International, KAMAZ, MAZ, SITRAK and YaMZ, and what the second half of the code (FMI) means in the standard.
InternationalKAMAZMAZSITRAKYaMZ
| FMI 0 | Cruise Control Enable Switch — Cruise Control Switch reading above normal range |
| FMI 1 | Cruise Control Enable Switch — Cruise Control Switch reading below normal range |
| FMI 2 | Cruise Control Enable Switch — Cruise Control Enable Switch error |
| FMI 2 | Cruise control: invalid switch combination |
| FMI 9 | Cruise control enable switch. K-line code on KamAZ-5490: ADM3 18309. |
| FMI 19 | Cruise control enable switch. K-line code on KamAZ-5490: ADM3 18319. |
| FMI 2 | Cruise control actuator circuit fault - Invalid switch combination. Blink code: 3-4-1. Repair: Check the cruise control unit and its wiring. |
| FMI 2 | Implausible cruise control switch signal. Scan tool code: P0575. |
| FMI 8 | Invalid combination of cruise control keys pressed. Scan tool code: P0575. |
| FMI 2 | Cruise control actuator circuit fault (Invalid switch combination). Blink code: 3-4-1. Repair: Check the cruise control unit and its wiring. |
Do not drive. Stop as soon as it’s safe to do so — don’t keep going.
The code is flagged critical: the manufacturer considers it unsafe to keep driving without checking.
This code alone cannot say what will fail next, so stop at the first safe opportunity and look at it on the spot.
That said, the manufacturer flags this code as critical — if in doubt, it is safer to stop and check on the spot.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.