Liebherr Fault Code
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Engine Misfire / White Smoke under Load
System
Fuel System
Symptom
Engine Misfire / White Smoke under Load
Diagnosis & fix steps
LOGIC: High Pressure Common Rail Pressure Sensor Signal Implausible.
ACTION: Check 5V reference supply and ground at rail pressure transducer plug. Connect mechanical pressure gauge to rail test port to verify true pressure against live scan data.
Red Seal field insights
HPCR Control: An out-of-calibration pressure sensor causes the engine ECU to over-compensate fuel delivery commands, leading to rough combustion or pressure dump trips.
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