Question

I got the engine code P0031 on my 2003 Infiniti G35 3.5L, what could be the problem? P0031 HO2s heater control circuit low bank 1 sensor 1

Answer 1

HI there,

In most cases replacing the front O2 sensor will resolve the issue. On this engine it's the passenger side of the engine and the first sensor which is mounted in the top of the converter or the exhaust manifold.

Answer 2

P0031 2003 INFINITI G35 Code - Air Fuel Ratio Sensor 1 Heater Bank 1 Control Circuit Low
Read more: https://www.autocodes.com/p0031_2003_infiniti_g35.html