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Code 174 means the O2 sensor is telling the computer the fuel mixture on bank two is too lean and the computer can not make the injectors give enough fuel to make it rich. The problem could be the O2 sensor, or it really could be a fuel problem. Bank two is the side with cylinder number 2 on a V6 engine.
you have 4 O2 sensors, bank one is the front cylinders ( close to the readiator ) there is 2 bank 1 O2 sensors one infront of the catalitic convertor ( bank 1 sensor 1 ) and one after the convertor ( bank 1 sensor 2 ) the same on the back cylinders they are bank two sensors 1 & 2 i will try to post the location of the wiring plugins if you find the plugs then you can folow the wiring to the sensor....good luck
bank #1is to the left of the engine when looking from the engine to the gearbox,the o2(lambda probe)sensor is on the exhaust down pipe.easier to get to from underneath.it looks like a small 1"round,2"long cigar with a wire on the top.
bank 2 is the cylinder in the front of the engine compartment near the radiator, the O2 is either in the exhaust manifold of the bank or in the exhaust pipe off the manifold, round about the size of a jumbo magic marker, you need a special O2 sensor socket to remove it in some cases, if it is in the open then a 7/8 open end wrench will work.
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