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I had my car inspected this week - first time with all the emissions testing. They plugged into the computer and said that not all of the codes were reading and asked if the battery was recently unplugged.
I had cleared the check engine code that comes on daily (0410). Was that the cause of his comment? I thought that resetting codes simply cleared them, not caused some to not read.
I believe he is getting a not ready result. After you clear a code I believe it takes about 40 startups so the emissions system will see that it is not re-occurring.