SOURCE: How to clean O2 sensor on a 2007 Pontiac G6?
O2 sensor are located before and after Catalytic Converter ( exhaust system of your car). If you car's engine is 4 cyl you have 2 O2 sensors and if you car's engine is 6 cyl then you have 4 O2 sensors ( for each bank, 2 for left bank and 2 for right bank). Hope it helps and comment if you need more advice. Please don't forget to rate the answer it helps with my ratings, thanks!
SOURCE: Vapor Purge Solenoid Location 2007 Pontiac GP
Near the gas tank next to the carbon canister. Check the under hood emission system sticker for exact location
SOURCE: 2009 pontiac g6 purge valve solenoid
code PO171 fuel trim system lean bank 1 conditions.possible causes air leaks in intake manifold exhaust pipes or exhaust manifold. fuel control sensor is out of calibration such as ECT IAT MAF.fuel component faulty like stopped up fuel filter fuel injectors clogged low fuel pressure faulty fuel pump. HO2S element contaminated or has failed. purge solenoid is part of EVAP system. if you have faulty purge solenoid you would get code like PO443 meaning evaporative emission control system purge control valve circuit malfunction.try replacing fuel filter clean fuel injectors see what happens.
SOURCE: where is the cannister purge solenoid on a 2007 ford e250
You should be able to locate it by the vacuum line diagram that should be located on the radiator support when you open the hood----you also go to autozone.com----if I remember correctly they have a vehicle part locator---you enter the part your looking for and it shows/tells you where it is on the vehicle
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