Caterpillar Fault Code
Free · no signupMID 036 CID 0100 FMI 01
Level 3 Red Stop Light / Engine Derate
System
Lubrication
Symptom
Level 3 Red Stop Light / Engine Derate
Diagnosis & fix steps
LOGIC: Engine Oil Gallery Pressure Below Safe Operating Threshold.
ACTION: Verify engine oil level. Thread a 0–150 PSI mechanical test gauge into the main oil gallery port to cross-reference sensor telemetry before condemning the pressure transducer or oil pump relief valve.
Red Seal field insights
Engine Safeguard: The A4:E4 ECM executes a Level 3 hard derate and forces engine shutdown within 20 seconds to prevent crankshaft journal and bearing wipe-out.
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