Re: 02 sensors hard fault but tested resistance 9.0 and 9.3 whats that mean they want
Well, you have already learned the most important lesson about the car : AVOID DEALERSHIPS !!!
Best bet for you is buy a cheap OBDC code reader and reset all codes, then see if they come back.
Also use the search feature on this forum, 99% of all possible failure/fixes are documented here.