CEL P0420 w/ new o2 sensor installed
#1
CEL P0420 w/ new o2 sensor installed
Okay considering that I have 163,000 miles, I figured I might as well replace the rear o2 sensor. I replaced the front couple thousand miles back. I do have a berk test pipe which I installed last year. Keep in mind I did not have any CEL's before this. So I installed the Denso sensor yesterday and today my CEL came on and the code P0420. The berk test comes with CEL fix. So what gives?
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