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Originally Posted by e430guy
I found the port, went to AutoZone and scanned. 2 codes came up: P0170, & P0173, which refer to 'fuel trim malfunction', banks 1 & 2. I'm thinking this is the O2 sensors, but how to dianose from here?
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with out proper diag hard to say, but normally when you see those codes it if from the airmass sensor, did it specify part load or at idle? if you do replace the airmass sensor be sure to do the filter as well