Help! engine light on

[edmarin]

My light came on and I read the code PO171 bank 1 lean. What causes this problem. I have cleaned my MAF, put fuel injector cleaner and it still goes on.
Could it be an O2 sensor. My car runs good like if it had no problem but stupid engine light goes on. Please help it's a 95 V6

 

[orangej]

Hey I had the same problem (and the same 95 v6) and it was the DPFE sensor. Easy to replace and not too expensive. Do you have any problems with spark knock? I'm glad to find someone with the same car. I don't think you have any O2 sensor problems.