How far/often do you need to drive after ECU reset before going for smog check (IL EPA)?

I had a bad gas cap and the dealer apparently reset the ECU to clear the code. I went in for a smog check at IL EPA and it was rejected because of the reset. A couple weeks later check engine light came on again, but it was an old code and they cleared it. Then it came on again a week later for bad oil pressure switch and ECU was reset again.

Anyway I need to get it checked by IL EPA before the end of May and need to know how far, or how many trips I need to drive for it to pass the EPA test. I am out of a job right now (deciding whether to retire), so I do not necessarily drive daily.

3 Answers

  • 5 years ago

    Could be 25 miles could be 100 The cycle's are different for each car What you doing is basically breaking in a new part so the ECM can basically link with it properly So it has to be "taught" basically .Which can be kind of quick or kind of long Dont get on the freeway if you dont have to By keeping the throttle in various positions Like in city driving is usually what you want to do

  • Evil C
    Lv 7
    5 years ago

    Usually anywhere from 50 to 100 miles.

  • 5 years ago

    drive cycles are different for every system in the vehicle and every year, make, model. Nobody could possibly answer your question. Read this post to understand how this works.

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