Gunger279 Posted March 19, 2014 Share Posted March 19, 2014 Was wondering if someone could help identify this sensor(with a name and part #) on my 2005 Legacy 2.5i (non-turbo) It appears to be broken. Also what affects could this sensor have on the car if not tended to promptly. *Also a P0420 code popped up on my way home (which is when I noticed this sensor) Would this sensor have anything to do with it? Thanks! Link to comment Share on other sites More sharing options...
Max Capacity Posted March 19, 2014 Share Posted March 19, 2014 P0420 Catalyst System Efficiency Below Threshold (Bank 1) Thats the front O2 sensor. Your picture looks like a MAF sensor ? is that the throttle body there ? 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
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