Q: 03 tacoma wont post "ready" for emissions after changing battery

asked by on October 24, 2017

changed the battery and now wont post "ready" for emissions test.mechanic said to drive it around 50 miles(freeway and surface roads) and it should post.driven it now nearly 200m (freeway speeds-50-70 and reg traffic speeds).last time he plugged into it still read "not ready".is there a particular set of driving that i need to do?this truck has NEVER failed emmissions in 9+ yeras and never had "check engine light"ect.what do i need to do?

My car has 141000 miles.
My car has an automatic transmission.

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