Codes P0340 and P0171 Crankshaft problem

Hello, I put a scanner from a friend to Audi and gave me two codes, one of them was P0340 and P0171.
The P0340 says that the Crankshaft is bad and needs to be changed, the P0171 code says it has to do with Oxigne's sensors.
Buy the Crankshaft brand Bosch and replace it, then delete the check engine light and the next day the check engine light came on again and assumed it was some oxygen sensor.
I bought a FIXD Scan which I would be sure would give me the code p0171 and my surprise was the following. It tells me that there is a code p0340 from the crankshaft that this is the problem and it tells me that the oxygen sensors went well, wow! ! I'm a bit confused and I don't know what to do, delete the check engine light and I'll wait to see what happens.
I would greatly appreciate any guidance.
Thank you have good day!