Mastering Fuel System Diagnostics Uncovering Engine Code P0171

P0171 means your car is running lean,stoichiometric ratio is not balanced.this means your vehicle is taking in more air than fuel.most times it ... The P0171 trouble code indicates that your vehicle's engine runs too lean on bank 1. This means the air-fuel mixture contains too much air and not enough fuel. Shop for New Auto Parts at 1AAuto.com http://1aau.to/c/433/k/scan-tools-code-readers Your check engine light is on, and you got the code ... The DTC indicates that the oxygen sensor on the first cylinder bank has detected lean engine conditions. This means that there is too much air or not enough ... After doing some Google searches, I found that code means air fuel ratio is too lean. So the measured af ratio has less fuel/more air than what ... the same lean code on both banks indicates it is a fault that affects the whole engine, so less likely to be an O2 sensor. I would take another ... A trouble code P0171 or P0174 means the oxygen sensor or Air-Fuel Ratio (AFR) sensor (in bank 1 [P0171] or bank 2 [P0174]) has detected a lean ... Code P0171 (system too lean - bank 1) ... my idle was perfect, vacuum was a was down a couple of hairs, car ran perfect... ... looks like i might ... 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 ... The P0171 code means that the engine is running too lean on bank 1, which is the side of the engine that has cylinders 1-3. This can cause ...