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Home >> Infiniti >> 2011 >> QX56 RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0460 Through P1220 >> DTC P0506: ISC System >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

NOTE: If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
DTC DETECTION LOGIC

DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P0506 ISC SYSTEM (Idle speed control system RPM lower than expected) The idle speed is less than the target idle speed by 100 RPM or more.
  • Electric throttle control actuator
  • Intake air leakage