MX-3.com

Hi, i bougth a new o2 sensor, because the old was bad. If i use a volt meter and measurre the back o2 sensors blue wire, it says 0,1 - 0,6 continuous. But when i meassure the front it says 0.1 volt constant, both on the new and the old o2 sensor.? If i meassure the gray wire it says 13,4volt, on both sensors. If i messure the blue wire to +, it says 13volt on the back and only 6 on the front.?

After the change i get no faultcodes anymore...

The car has high fuel consumption.

Plz help....

if you replaced it and the codes went away then you fixed it, if it was dead you'd get a CEL

If your gas mileage is still bad well that's typical, you have to drive the car till you complete a cycle in which all the data has been stored in the ecu.

what about the measurements??

.1 to .6 sounds fine and the 13 volt deal is the heater wire of course.

Yeah the 0,1-0.6 is fine, but it is the back o2 sensor, which is fine. But the front sensor only says 0,01 constant... And the 13volt is not the heater wire. It is the input wire....