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Home >> Infiniti >> 2019 >> Q70 3.7 Luxe, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (3.7L) (DTC/Circuit Diagnosis) (5 Of 9) >> DTC/Circuit Diagnosis >> 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 No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0506

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 leak
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