P0037 MAZDA - Mazda 3i 2006

Question

Hi, My Mazda 3i 2006 is showing me that code P0037, but i don't know which one of the o2 sensor I have to replace. Help.

Answer 1

Hi there,

This code is for the middle O2 sensor. The car has 3 sensors, one right in the exhaust manifold off the engine, then a second one after the pre converter, then finally the third one under the car. You need to replace the second one from the exhaust manifold.