I am getting a "time for regular service" message, as well as a recurring "engine system service required". I used Advance autos code reader and it showed no codes. The "engine system service required" message does come and go, but seems to be there more so than not now. I just tried to clear the "time for regular service" message by turning the key to position I, and holding the trip reset, then turned it to position II. The yellow triangle with the exclamation blinks 5 times and then stays on but the message remains. It did not clear the service message, and then the display showed 045. I have never seen a number message before in that display? What does it mean?