O2 sensor again...p0161
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 907
Likes: 0
From: Harrisonburg VA
O2 sensor again...p0161
CEL came on the other day, checked the code this morning, p0161. I just replaced the bank 2 rear 02 sensor 3 months ago and the light has stayed off. It has now come back on the other morning while warming up. I'm guessing my sensor is good, but I have a problem elsewhere, wiring, connector maybe?
Thoughts?
Thanks.
Thoughts?
Thanks.
Pro
Joined: Apr 2007
Posts: 635
Likes: 0
From: Mc Farland Wisconsin
Somewhat off topic, but im gonna throw it out there...I also have a 99 yukon denali, and the cats went bad, a few weeks after the cats were replaced, i started getting a 0161 code, drove it like that for a year just always resetting the code, tripped more in the winter probably due to a heater not turning on...changed the sensor last week and when the cats were installed and the 02 sensors swapped to the new y pipe, the harness was not routed correctly and had been rubbing on the heat shield, therefore slicing through the 02 sensor wires, only took a few weeks for it to start doing that for me so i would check the wiring
