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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Engine Control System (DTC/Circuit Diagnosis) (5 Of 5)) >> DTC/Circuit Diagnosis >> DTC P2128: App Sensor >> DTC Description >> Fail-Safe

DTC Description: Fail-Safe

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Electric throttle control actuator

(When electric throttle control actuator does not function properly due to the return spring malfunction:)

ECM controls the electric throttle actuator by regulating the throttle opening around the idle position. The engine speed will not rise more than 2, 000 rpm.

(When throttle valve opening angle in fail-safe mode is not in specified range:)

ECM controls the electric throttle control actuator by regulating the throttle opening to 20 degrees or less.

(When ECM detects the throttle valve is stuck open:)

While the vehicle is being driven, it slows down gradually because of fuel cut. After the vehicle stops, the engine stalls.

The engine can restart in the N or P position, and engine speed will not exceed 1, 000 rpm or more.