It could be an issue with software. Either the Monitor or the Machine ECM software might have a glitch. There are at least 5 updated Monitor software Part Numbers post 449-3369 that I can see. The latest part number I am certain of is 578-6309 and there are a couple of later numbers (608-9077 & 661-8074) that I can't say either way. I'm fairly sure that if the Monitor software was to be updated then the Machine and Engine ECMs should be done at the same time because different software generations generally don't play well with one another. Unfortunately it would not be possible to re-flash 449.3369 because it was discontinued as soon as a newer Part Number replaced it. The worst part about the Monitor Panel is that it requires a memory stick plugged into the back to update the software. It's not done directly via ET like the other two ECMs on the machine. It was discussed HERE .