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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 2310 (Engine Control System - DTCS P0451 To P1212) >> DTC P0643 Sensor Power Supply >> On Board >> Fail-Safe Mode
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Fail-Safe Mode

WARNING: This page is about a different car, the 2006 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.

ENGINE OPERATION CONDITION IN FAIL-SAFE MODE

Engine operation condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.