Safe to driveDrivable, but watch it yourself
SPN 4058 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by International, Knorr-Bremse EBS and MAN, and what the second half of the code (FMI) means.
InternationalKnorr-Bremse EBSMAN
| FMI 2 | Cab Dome Light 1 Switch — Cab Dome Light Switch is reporting an error. |
| FMI 4 | Sensor steering angle, CAN link. No signal |
| FMI 8 | Sensor steering angle, CAN link. Erroneous signal |
| FMI 4 | Sensor steering angle CAN link - No signal |
| FMI 8 | Sensor steering angle CAN link - Erroneous signal |
| SPN 4058 FMI 24058/2 · 4058.2 | data erratic or intermittent |
| SPN 4058 FMI 44058/4 · 4058.4 | voltage below normal or shorted to ground |
| SPN 4058 FMI 84058/8 · 4058.8 | abnormal frequency or pulse width |
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.