2000 Nissan Maxima Can't read OBD-II Codes?

2000 NISSAN MAXIMA
99,000 MILES • 6 CYL • 2WD • AUTOMATIC
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CANYONBREEZE
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2000 Nissan Maxima.

My Service Engine Soon light came on. When I tried reading OBD-II codes with my Innova 3100 I just get Err, no codes, also can't reset. I removed the battery cable, checked all the fuses, replaced a couple (including lighter) just for good measure, replaced the batteries in the code reader. Still can't read codes. The reader worked fine on this same car 2 months ago and still works fine on my other car. The car seems to be running fine but I need a smog test and can't with the dang light on. Any ideas? Thanks.
Jun 21, 2008 at 1:19 PM
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MMPRINCE4000
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Clean the connector on the car with an electronics cleaner, may be some dirt/grease got in there.
Use an inspection mirror to look at the back of the connector, may be a loose wire.
Otherwise call Innova and ask them.
Jun 22, 2008 at 7:31 AM