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posted by  KlausC on  Sat Dec 14 10:54 CST 2013
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

P0455 = large leak in EVAP system. Not mileage related. Either a loose gas cap, purge valve stuck, or a cracked J hose problem.

Your XC probably is still using the original front O2 sensor. They should be replaced around 120K miles or so and will dramatically improve the mpg. Also look around for leaking vacuum elbows as reduced vacuum will also decrease mpg.





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