Just changed o2 sensor was wondering if there is just on on my 91 v6 3.0 4runner. And is there a break in period? And should engine light go off or I need to get that reset?

 

Only CA emission vehicles have 2 O2 sensors.

No break in.

You can reset the CEL by taking out the 80 amp fuse under the hood (REQUIRES that you remove the fuse panel & take out the bolt holding it in!) or disconnect the battery for 10 minutes if you don't have radio codes you want to keep.

 

Thanks A lot. Everytime I have a question on here you all are so helpful. Thanks again