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Home >> Infiniti >> 2023 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (5 Of 5) >> DTC/Circuit Diagnosis >> DTC P34C8: Electric Intake Valve Timing Control Module >> DTC Description >> Fail-Safe
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DTC Description: Fail-Safe

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Device fix mode
  • This mode fixes the EVT control solenoid valve in the reference position.
  • The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).

Combustion control mode

Idle speed control

Stops feedback control of idle speed and controls with specified speed.

Recovery speed control at decelerating

Stops recovery speed control by the fuel cut at decelerating and controls with specified speed.

Others

ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.)
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