O2 Sensor Bad?

[RaysTsi]

My 02 sensor stays flat .04v at idle and my mpg sucks and my car idles like crap. It does go upto around .98v-1.04v at WOT though.

Is it time for a new 02 sensor?

 

[Rx3]

Which O2 sensor are you talking about?

Sounds like the front 02 sensor . A nice easy check is to unplug the sensor and use a multimeter to check for continuity between terminals 3 & 4.

If you are using a datalogger, check to see what you Fuel trims are doing. This will be the sure giveaway if the front O2 sensor shit the bed.