I have searched for it and cannot find out what its for. I found P0170 but not P0171. Does anyone know what its for?

 

i was pm'd by a member and was told its a lean code. Commonly found after a re-flash with bigger injectors because the react slower/different pulse width when they are rescaled... i guess. Well it makes sense.... I just rescaled my injector map and did some fine tuning with the safc. The a/f/r is perfect but the signal coresponding with the ecu thows the light.

Okay, good to know.