Do not driveTo the nearest safe stop
J1939 code SPN 1063. 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 1 | Wear indicators brake pads, wheel 4. Too high |
| FMI 2 | Wear indicators brake pads, wheel 4. Too low |
| FMI 1 | Wear indicators brake pads wheel 4 - Too high |
| FMI 2 | Wear indicators brake pads wheel 4 - Too low |
| FMI 2 | Brake lining wear sensor, rear right, signal failure. Repair: Check the continuity of the wiring. Check the sensor specifications. |
| FMI 12 | Brake lining wear sensor, rear right, supply, short to ground. Repair: Check the continuity of the wiring. Check the sensor specifications. |
| SPN 1063 FMI 11063/1 · 1063.1 | data below normal range (most severe level) |
| SPN 1063 FMI 21063/2 · 1063.2 | data erratic or intermittent |
| SPN 1063 FMI 121063/12 · 1063.12 | faulty device or component |
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.