Ok, I am getting code 11 with the engine off, ignition on. I currently get codes 21, 41, and 91 (engine on) with brand new 02 sensors. I know 21 has to do with the coolant temperature sensor. Also the test was done while engine was hot, drove about 20 miles before I tested it. According to my code book I have it says that codes 41 and 91 also mean the engine is lean. How do I fix all three codes? Thanks in advanced!