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Home >> Infiniti >> 2024 >> Q50 Luxe, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (7 Of 7) >> Engine (ECM) >> P25DF Electric Intake Valve Timing Control Motor >> DTC Description

DTC Description

DTC DETECTION LOGIC 

DTC CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P25DF A camshaft posi control B1
(A camshaft position control bank 1)
Diagnosis condition Engine running at idle
Signal (terminal) Electric intake valve timing control motor signal
Threshold Detects electric intake valve timing control motor signal malfunction.
Diagnosis delay time -

POSSIBLE CAUSE 

FAIL-SAFE 

Fail safe mode Vehicle behavior
Device fix mode
  • Fixes electric intake valve timing control motor in the reference position.
  • Fixes exhaust valve timing control solenoid valve in the reference position.
Combustion control mode No stratified charge combustion at starting (cold start).
Others ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.)
NOTE: Normal bank transitions intermediate F/S valve timing.