Car Fix DIY Videos

How TO Fix “P0171” Code ON a Audi A4 | System To LEAN Bank 1

This is a three part series on our 2008 Audi A4 – Check Engine Code P0171. In this Episode we install a new MAF Sensor join us on this journey to see if this fixes the issue.

2008 Audi A4 – Check Engine Code P0171: This repair is on a 2008 Audi A4 2.0 Turbo, but other models will be similar. The P0171 code means that a vacuum leak exists near this side of the engine or there is a fuel delivery issue on the first bank of the engine. The first bank or bank 1 is usually located on the same side of the engine that contains cylinder number 1. A lean condition occurs when the engine either receives too little fuel or too much air.

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– Scout