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B3 Service appeared and disappeared

4123 Views 1 Reply 2 Participants Last post by  SteelyJoe
The maintenance minder in my 2006 Accord (4 cyl, 85,000 miles) came on with the B1 code since I was due for an oil change. A few days later the code changed to B13 meaning I also needed a transmission fluid drain and fill. One day later the code changed back to just B1 without me resetting anything.

Is it unusual for the code to disappear like that?

I am going to replace the transmission fluid when I do the oil change. Do people usually replace the filter, or is that not necessary?
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