Updated: 2026-11-14
The reference covers 28 codes from the factory tables of WABCO ABS/ESC — the full list by system is below, stop-now codes first.
WABCO ABS/ESC is a table of brake electronics: 28 codes under J1939. Most of the codes concern the brakes. The codes that mean stop are listed first on the page. If the reading has several ABS codes together with CAN codes, check the connector and the unit power first, not the wheel sensors.
Start with these codes:
A code has two halves. SPN is what is actually at fault — the sensor, component, or parameter. FMI is what is wrong with it — value out of range, open circuit, short circuit, invalid data. So “SPN 100” alone is not a diagnosis yet, but “100/1” already tells you oil pressure has dropped below normal.
That is almost always how it goes: one fault drags five or six codes behind it. An empty AdBlue tank first throws a level error, then interrupted dosing, then a NOx excess and a torque derate. Fix the root cause and the rest clear on their own. Paste the whole list — we will show which code is the root cause.
Problem pages that cover codes of this make.
WABCO (part of the ZF group since 2020) supplies brake electronics for most European and many other tractors and trailers. ABS and EBS faults are read with a scan tool over CAN. The amber ABS lamp means anti-lock is partly or fully disabled; the trailer reports its own lamp through the ISO 7638 connector.
The air brakes themselves keep working because the pneumatics are independent of the electronics. What you lose is anti-lock protection and related functions such as ASR and ESC.
1. Read codes and freeze-frame data. 2. Check supply and ground. 3. Inspect connectors, starting with the ISO 7638 plug on the trailer. 4. Measure the wheel sensor: a WABCO sensor is typically around 0.9-1.3 kOhm; compare with the sensor on the same axle. 5. Measure the modulator coil and test the wiring. 6. Replace parts only after that.
Yes, carefully and not for long: the brakes work but without anti-lock. On a slippery road a wheel can lock. Keep extra distance and have the fault repaired.
Supply and ground of the ABS unit, the ISO 7638 plug and the CAN network. Check those before the unit.
ABS only prevents wheel lock. EBS also controls braking electronically and exchanges data with the trailer over CAN.
Their cables flex every time the wheels turn, and they are exposed to spray from the tyre.
Know the code number? Type it into the search — or paste the whole list from the scanner and we will show which fault is the real one.