Hitachi Fault Code

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0164-11

Engine Sluggish / Hard Start Hot

System

Fuel Injection / HEUI

Symptom

Engine Sluggish / Hard Start Hot

Diagnosis & fix steps

LOGIC: Injection Actuation Pressure (IAP) Mechanical Performance Error. ACTION: Measure actual hydraulic injection actuation pressure against commanded pressure with a mechanical gauge. Inspect IAP control valve spool for scoring or debris sticking.

Red Seal field insights

Hydraulic Injection: The ECM detects a deviation greater than 3 MPa between commanded and actual oil actuation pressure used to fire the mechanical-hydraulic injectors.

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