Safe to driveDrivable, but watch it yourself
J1939 code SPN 1057. Below — how the fault is worded at the factory by Knorr-Bremse EBS, MAN and Renault Trucks, and what the second half of the code (FMI) means in the standard.
Knorr-Bremse EBSMANRenault Trucks
| FMI 3 | Central control unit, no response to air pressure sensor. Not identified |
| FMI 3 | Central control unit no response to air pressure sensor - Not identified |
| FMI 7 | Pneumatic supply failure (not stored). Repair: Check the trailer pneumatic supply circuit. |
| SPN 1057 FMI 31057/3 · 1057.3 | voltage above normal or shorted high |
| SPN 1057 FMI 71057/7 · 1057.7 | mechanical system not responding |
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.