Engine Code P0171 The Essential Guide to Diagnosis and Repair

The P0171 code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the... The P0171 OBD-II code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. This code is mostly caused by a vacuum leak. The intake manifold is most likely the cause, especially on this engine. The P0171 code means your engine is running lean, with too much air and not enough fuel. Common causes include vacuum leaks, ... Your Oxygen sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module ( ... Your problem is more than likely an air leak. That code means you are running lean period. There is only one bank...so disregard the idea of a bank two. The lean code P0171 is in most cases set due to eaither a vacuum leak in and around the intake and or in most cases if you dont have a vacuum leak, its usually ... Code P0171 indicates Bank 1 of the engine has a lean fuel mixture. P0174 indicates Bank 2 of the engine has a lean fuel mixture. Based on the information you provided, it seems like your vehicle is displaying a P0171 error code, which typically indicates a problem with the ... My 2005 mustang GT's check engine light came on yesterday. The 2 codes were P0171 and P0174 which are lean codes for bank 1 and 2 of the ...