So i have EML light up with the fault code P0135 which i read with my reader can anyone tell me if they know how to check the sensor for resistance as in which wires colour etc. Just to check it is the sensor and can anyone tell me which sensor is bank 1 is this the one closest to the brake fluid reservoir or the one close to front of car. Also what problems will this cause apart from the EML light on thanks for any help.