Question about 2000 Mitsubishi Galant
P0170 fuel sys is too rich or too lean on bank 1 it could be maf sensr or oxy. sensor both are expensive. or vaccume lines loose or crack. my suggestion is get an honest mechanic how much this codes cost. dont just go to one mechanic. shop around until you are sure. remember labor cost a lot too. your problem might just a loose tube or tube crack or crack pipe that the air sip inside or out of your exhaust manifold and oxy sensor tell the pcm computer that fuel is too rich and lean. oxy sensor dont lie they have thier own code
Posted on Jul 25, 2010
The maf sensor for sure, to be tested. it reacts to temperature changes, Mass Air Flow sensor
Posted on Jul 04, 2010
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Posted on Jan 02, 2017
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P0170....Fuel Trim (Bank 1)
from reading the code it is about fuel and its the mixture isnt correct ,this i think is being caused by a faulty O2 sensor on bank one but as iam in europe and out gallants are normally a 4 cyl engine i am afraid i couldnt tell you whats bank one weither its the left side or the right side but if you can find out what side is bank one then its just a case of testing the O2 sensor with a automotive meter then changing the appropiate sensor as theri are two sensors fitted one before the cat and one after but without a tester on it its difficult to say but i would check the after the cat sensor first.
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