2002 Toyota RAV4 "master multi fuel heater" Questions

master problem oxygen sensor signal error on toyota rav4 2002 model Are we a little confused? Do you have codes,suggesting an O2 Sensor on Bank 1,has a failed heater? Have it tested with a scanner, at

Master certified sense 1979 For future reference disconnect the positive lead if you are not going to use it for a long period of time. Using a multi-meter, set the dial to read Vdc. Take a reading of