Question about 1996 Nissan Sentra

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Computer "not ready" for emmissions testing

1997 Nissan Sentra, Car failed emmissions testing because computer was not ready. Check engine was ON due to throttle position sensor. Replaced sensor. I disconnected the battery for 20 seconds and drove the car over 100 miles, connected an OBD scanner but it couldn't read the computer either. What should I do or check for?

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  • Anonymous Mar 31, 2009

    1996 Nissan Sentra was "not ready" after having disconnected the battery and driven 3,000 miles. The check engine light NEVER came on. Failed inspection 5 times.

    How can I fix this?

  • robert_albre Apr 14, 2009

    I have the same problem. I cleard a code my self for a bad speed sensor about 3 weeks ago. I took my car in to have the smog inspection done (CA). It failed the computer diagnostic (just three little parts). so the tech told me to just drive it around for a while and then bring it back in. The tech is pretty cool it wont run the full test he just checks the computer first and if it passes then he will do the test. So I have been bringing it almost every 2 days. Out of the three trouble spots only one has corrected it self. I am now past my plate experation I paid my registration so I would not have to pay the late fees I have no Idea what to do.



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Your computer will re-set and be "ready" after a certain number of restarts and miles, depending upon how much you use the car it should take from a few days to a week. Surprised the tech didn't tell you that!

Posted on Mar 22, 2009


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