I own two older ford Vehicles
a 200 Expedition (Eddie Bauer) with a 5.4 and 148k and a 1997 F-150 Extended with 138K. I look forward to keeping both these vehicles around for a lot longer. Both paid for and not ready for another car payment. Anyway I have an issue with my Expedition. My Service Engine Lite came on this week. I asume it to be an O2 sensor and the folks at Auto Zone put a mter on it. How acurate is the meter in checking a Service Engine Soon vice Check Engine. How can I verify this as they do not look like they are easy to access and it is very cold out side.