Re: Check Engine Light
This where it is handy to have an Android device (phone or tab), OBD-II dongle, and Torque Pro: The secondary O2 sensors should both read about .6v when lit off, they just verify that the catalyst is doing its job. Unlike the pre-catalyst O2 sensors they do not transition much.
For me that is as much a part of my on-board tool kit as a lug wrench....errr assuming we had a spare tire.
ps if I were getting that, I'd swap the two secondary O2 sensors side to side and see if the code follows. If not you may have a different problem.
Last edited by Padgett; Aug 19, 2014 at 02:17 PM.