Troubleshooting Engine Code P0171 The Essential Guide for Mechanics

More often than not P0100, P0110 and P0171 are related to the MAF being dirty or worst case damaged. Normally you start with the lower codes ... 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. Autozone told me it was a P0171 code which means the fuel system is too lean....possibly due to a MAF sensor, Oxygen Sensor, intake leak, or any ... 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 surging rpms sound like the plastic hose from the intake to the turbo has a vacuum leak. Check both ends for fitness and take a good look at the hose. From TSB, P0171 - System Too Lean (Bank 1)The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The code is set when the ... This code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the ... Your Oxygen sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module ( ... PCM & Fuel Systems - Engine Code P0171 - #P0171- According to the book it means System adaptive feul too lean (bank 1) . 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.