Giovonage Posted May 1, 2013 Share Posted May 1, 2013 My 05 lgt just started reading out p0171 (system too lean?), p0133 (o2 sensor slow response?) and p0303 (cylinder misfire?) codes. Oh and it seems to be a bit down on power, especially when the turbo kicks in Im guessing the problem is the 02 sensor but after looking through the forums I'm hesitant to spend $150 on a new one, since most of the time it isn't really the problem. Any suggestions? Link to comment Share on other sites More sharing options...
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