P1148 Nissan - sentra 2004

Question

I need more information p1031 p1148

Answer 1

Hi there,

Both codes point to a problem with the front O2 sensor on the car. The 1031 indicates an issue with the sensor heater itself and the 1148 means the car is not achiving closed loop operation because of it. You should be able to replace the front sensor to resolve the problem. This is the one you can see in the exhaust manifold.