So my wife's 2005 Camry XLE V6 (67,000 miles) had the check engine light come on and now her "Trac Off" light is on. I had the codesscanned and it turned up P2238 and P0031. Apparently P2238 is noted in TSB EG037-4 and is a known issue with a faulty Air / Fuel O2 sensor at Bank 1 Sensor 1 location. Has anyone replaced this part? Apparently it's just behind the manifold on the drivers side? P0031 is supposed to be the O2 sensor just in front of cat. converter. Dealership quote me $495 which sounded like a lot just for an couple O2 sensors. Anyone out there have any tips or info?