PACCAR MX (2004 Emissions) Fault Code: U1891 CAN Communication - Message (EBC1) Data Not Correct of Available, Anti-Lock Brake System Active from Brake System

SET CONDITIONS:
This DTC is set when a CAN message is received correctly, but the content (signal value or status) is not correct or not available.

DIAGNOSTIC CONDITION:
The diagnostic runs continuously when the ignition is keyed on.

CORRESPONDING OBD READINESS MONITOR:
None

RESET CONDITION:
The DTC changes to inactive after the diagnostic runs and passes.

REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back?
- No, repair successful
- Yes, repair unsuccessful

POSSIBLE CAUSES:
A malfunction in the system from which the message originates

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