PO172 Bank 1 system too rich.PO175 Bank 2 system too rich. The tps may be bad. or the MAP sensor. They both control the fuel system.
I do not have a legend with me to tell what the code means. My obd scanner gives definition along with the codes. I recommendations that you hook it up with scanner and judging by the symptoms it will likely be the egr or idle control valve or a combination of both. When a vehicle runs rich it normally fouls the o2 sensor and another code will appear when repairs are completed. If you have a code checker it should have come with a legend and if it is a special code some haynes manuals go into code definitions so never fear. An o2 sensor will not cause it to stall at idle but egr and idle control valves will. They are expensive so be sure before replacement. As for the code meanings 170 is bank 1 fuel malfunction and 172 is fuel trim too rich. This means that you either got a defective egr valve or fuel regulators causing a rich condition. In other words tour vehicle is overfueling either because of the egr or fuel regulator. Idle control is not an issue so disregard that earlier assumption.
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help! Yesterday I added some injector cleaner to the gas thinking this would help it just made things worst. So I went to work with my brain and ended up way over my head pulling this and that here and there new pcv valve,vacuum hoses, new air filter, now I'm trying to find the maf sensor so I can clean it no such luck ! Where is that mother? Any ways I have one big head ache!!! so all of you out there trying to help us with our problems thanks and hats off to y'all !!!!!
Back for more flack! I'm still having the same old problem with my 2005 dak 4.7l slt 4wd po172 po175 my list keeps growing ! I've replaced pcv, some vacuum hoses, air filter, and added injector cleaner to the gas . I'm looking for the MAF wondering if I even have one ? Anyways so far my growing list is (check) the 02 sensors, coolant temp sensor, TPS, MAP, EGR, and the fuel regulator, anything eles I should add?
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