When you clear the O2 sensor code(s), do the same codes keep coning back? An O2 sensor is like a battery that sends a voltage signal to the ECM in 10ths of a volt. If your sensor is reading 000, as you say, there is no signal to the ECM so, it has to guess which puts it in "limp" mode. You can test the O2 sensor by removing it and with a voltmeter attached, heat the sensor tip with a propane torch and watching for voltage rise. Warning, if you put the same sensor back in, be sure to coat the threads with an anti-sieze compound or you'll never get it out again. Hope this helps and thank you for your donation, Jim.
Sunday, November 16th, 2008 AT 3:42 PM