Liebherr Fault Code
Free · no signupP1187
DeNOx Warning / Slight Power Reduction
System
Emissions / SCR
Symptom
DeNOx Warning / Slight Power Reduction
Diagnosis & fix steps
LOGIC: SCR Aftertreatment Warning Level 1 (DEF Quality / Dosing Malfunction).
ACTION: Test DEF concentration with a refractometer (spec: 32.5%). Inspect DEF dosing module pressure sensor and supply lines for crystallization.
Red Seal field insights
Inducement Timer: Triggers a 60-minute countdown window before forcing Level 2 torque derate.
Track this across your whole fleet
This code is free to read. AM Fleet Integrity lets your team log fault codes against assets, plus the full fault-code library, QR operator reporting, PM scheduling and predictive alerts. Start free — no credit card required.
Start your free trial