I recently changed my two o2 sensors in the front and now a month later i'm getting 0707 for the rear 02 sensor I reseted the ECU and the check engine light came back after I filled up the car with gas I then did the self diagnostic with ECU then I got 0707 and 0304 which is the knock sensor. If I change the 0707 will the 0304 code go away or do I need to do both?

THANKZ ALOT

 

Whenever you post a technical question it is helpful to specify ...
- model year
- transmission
- odometer reading
- mods (if any)
- recent repair history
- a detailed report of symptoms

I suggest you replace the rear Oxygen Sensor and reset the Engine Control Module. That one repair may resolve both codes.

 

Thankz for the quick reply DBM but should I go with the nissan rear 02 sensor or can I use the after market sensor.

 

Either will do. Make a price comparison between the factory part and the aftermarket sensors.

Read the first post in the Sticky 4th Gen Maxima Maintenance. You will see contact information for dealers who sell genuine Nissan parts at a discount. You may be able to get a Nissan sensor for the same money as an aftermarket item.