Unveil the Mystery of Engine Code P0171 A Comprehensive Guide

This is one of the most common trouble codes in V-6 and larger engines. P0171 is a "System Too Lean (Bank 1)," which is triggered by the first exhaust ... P0171 means the computer is correcting for a lean condition on bank 1 (the rear bank.) A lean condition can be caused by any number of things. PCM & Fuel Systems - Engine Code P0171 - #P0171- According to the book it means System adaptive feul too lean (bank 1) . 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. code says the o2 sensor is reading too much oxygen ( ie not enough fuel to use up the alotted air). ... When you say you have an 80 mile range - ... 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. It's very possible that you do have a vacuum leak. The only real way to find out is to get a hold of a scanner that you can monitor the O2< ... That's a lean code. Any unmetered air that gets in the system can cause that as well as low fuel pressure. If your canister hose was loose ... P0171 is System too lean, (Fuel Trim) bank 1 ... Here are your trouble areas ... Air Intake hose, loose or cracked ... Fuel line pressure ... Injector ... It could be lean under high load/demand conditions and fine at low load. Mixture lean/rich codes can't set until the O2 sensors are active and ...

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