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Home >> Infiniti >> 2019 >> QX50 Essential, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (3 Of 12) >> DTC/Circuit Diagnosis >> DTC P0122, P0123: TP Sensor >> DTC Description >> Fail-Safe
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DTC Description: Fail-Safe

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Combustion control mode

Stratified charge combustion control at starting

No stratified charge combustion at starting (cold start).

Others

  • The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10 degrees.
  • The ECM regulates the opening speed of the throttle valve to be slower than the normal condition. So, the acceleration will be poor.
NOTE: If throttle position sensor 1 and 2 malfunction at the same time conducts following control.
  • ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.