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Originally Posted by ducboy
Thanks for getting back to me Charlie. I bought an OBD-II scanner tool today. I assume I can run the 02 monitor test to verify that system is ok?
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You can't manually run the various monitor tests. The ECU runs them periodically, and when the conditions are right, the tests are completed (and you either pass of fail).
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I actually picked up the car in Virginia and drove it back to St. Louis, so I would guess that the readiness codes should have popped by now I also took her out today for ~50 miles with the scanner on data record, and they never came off incomplete.
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The tests are more complicated than that. They involve starting the car from cold, driving below a certain speed for periods of time (often within a high and low temperature range), Starting a warm car, and driving below a set speed for a set time. Driving above as set speed for a set time (with the engine in a specified "load range"),etc. Additionally, most of the tests require multiple completions before a status code is set. The number of completions and the parameters vary from car to car, make to make. It's not simple at all. Usually if you drive the car regularly for a couple of weeks is will complete the various tests. Just one long trip and one long drive isn't going to do it.
By the way, clearing any codes, will also clear any completed readiness tests. So will disconnecting the battery. Do either of that, any you have to start all over with the readiness tests.
Bottom line is that driving straight from Virginia to St. Louis is unlikely to have met all the various parameters. Even driving for another 50 miles probably didn't do it.