Hi, I just had a JDM swap done on my car and am getting a P0171 code. I put a new 02 sensor on, cleared the codes, and it came back. I went through looking for loose hoses, cleared the codes, it came back. The intake gasket doesn't appear to be leaking, I did the 'spray test.'

I've got a few questions, if anybody has insight:

Has anybody else had the P0171 issue after a JDM swap? How did you solve it?

Is there any reason why keeping on a JDM fuel rail and injectors would cause a P0171 code?

Any help would be appreciated. Thank you!