where can I locate the heated oxygen sensor heater control circuit of mazda mpv 2002

Question

Check engine light on, p0031 code reading

Answer 1

HI there,

This code means there is a problem with the heater circuit in the O2 sensor. The sensor is the front O2 sensor on the engine closest to the radiator. Usually the sensor itself is the problem. The fuse labeled IGN 1 is the power supply for the heater.