Resolving Engine Code P0171 The Comprehensive Troubleshooting Guide

P0171 means a fuel system running lean on Bank 1. Our expert mobile mechanics can diagnose and fix your P0171 trouble code wherever you are. The ECM has the power to adjust the amount of fuel injected if an increase in the amount of air being fed into the engine is detected. However, ... In the most literal sense, the P0171 code means “System Too Lean (Bank 1).” This trouble code points to a lean running engine condition on the ... Your Oxygen sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module ( ... This code indicates that there is either too little fuel or too much oxygen in the air-to-fuel ratio, specifically relating to the first cylinder bank of the ... 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 ... Check the engine air intake duct for leaks/tears/holes, especially in the folds. It's a common source of a Murano vacuum leaks... 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. Most everyone said the O2 sensors seldom are the reason for the code. Most all said look for a vacuum leak. The last thing I did was to replace ... 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 ...