I got a CEL and had the codes checked and they came back P0133 & P0130 which both pointed to the O2 sensor, but after apporx. 75 miles the CEL went out. The vehicle was drivng fine and the I noticed at about 50-60 mph I have hesitation and stuttering. If I increase acceleration a lot the hesitation is gone. O2 sensor??? Coil pack??? Any suggestions.

 

Yes, Bank 1, Sensor 1 is the O2 sensor located closest to the engine before the converter.

Here's the writeup:
http://www.4runners.org/articles/02sensor/


$89 dollars OEM denso sensor http://www.urdusa.com/product_info.p...s_id=430006000

 

Sorry if this sounds rude but if it is giving you an O2 sensor code then I would think that it has something to do with your O2 sensor. That is unless you have a bad cat.