After installing the new TFI and running the 1st tank of gas after the install I decided to check if I had any codes , I had none . My question is when I held the odometer button in for the 5 seconds my horn honked . I had to reset my clock also after having the battery disconnected and while holding the button in for 5 seconds the horn honked then also . I do not have security so I was wondering why this happened , the 1st time it did that I about jumped out of my shoes . By the way I got 33.86 mpg and that was just driving around town with a lot of start stop driving so I'm pretty pleased so far , going to check interstate mpg soon and will update .