My wife suddenly had error messages today, Check AWD System, check engine, traction. Carista reports P0138 O2 sensor high circuit voltage bank 1 sensor 2and also C1241 ABS low battery positive voltage. I get the O2 sensor or wires could be bad, but the C1241 could be expensive ECU. Think both could happen at same time or just a thrown code? Reset turned warnings off but Carista reports permanent for P0138.

 

I believe someone here posted similar thing a while ago and the issue was with the battery ( for that person) check your battery life, see maybe a new battery can do the trick otherwise hit the dealer

 

Yeah, best first step is to replace the battery. Weak batteries will cause all sorts of goofy symptoms.

 

Thanks but the battery is very new so unlikely to be the problem, although perhaps the contacts aren't good. Thanks for your posts.

 

Believing in the cheapest fix first, I would make sure the gas cap is tightened all the way. Tighten it, fill up the tank, tighten the cap again. Wait a few weeks (or go to an auto parts stood to have them reset it

 

Oh it's just the dreaded 68666 devilish mileage!