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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) >> P2578 TC/SC Speed Sensor A >> DTC Description

DTC Description

DTC DETECTION LOGIC 

DTC No. CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P2578 Turbocharger/Supercharger speed sensor A
(Turbocharger/Supercharger speed sensor "A" circuit)
Sensor signal is not inputted for 2 consecutive seconds while the following condition is satisfied:
  • Engine speed: more than 1, 400 rpm
  • Boost pressure is applied enough.

POSSIBLE CAUSE 

FAIL-SAFE 

Fail safe mode Vehicle behavior
Others Torque have to be limited to the operating range that does not generate the over speed of the turbocharger.