Question

2002 Nissan Sentra SER Spec V 2.5L with engine code P0031, also the car stall at 25 mph

Answer 1

Hi there,

This code is for the heater circuit on the front O2 sensor. This should not cause a stalling problem especially at 25mph. I would look more for a fuel issue then a probem with the O2 sensor.

Answer 2

I doubt the Oxygen sensor will cause the stall problem, there must be something else.

P0031 Nissan Code - HO2S11 Heater Control Circuit Low
Read more: https://www.autocodes.com/p0031_nissan.html