I did have a p0171 cel. Bank one lean. I reset the computer and the cel has not come back. It's been 4 months. I am going to replace the downstream sensor and take if from there. I have read the how to article and I am unable to match the part number with the correct sensor. See the web link below.

https://www.autopartsway.ca/secure/cart.cfm

I hope this is the right sensor

Thank you for you help

15.639 88.63MPH SVT Driver