Just got my first OBD2 scan tool and am having some fun with the live data. It's a Bluetooth model "BlueDriver" (bluedriver.com) that is well reviewed on the net, and includes enhanced code support for Honda vehicles. It can be purchased on Amazon.
Got a brand new Honda, so no chance to check any fault codes yet (hopefully not for a long while!). However I'm having some fun with the live data! A few interesting things I've noticed so far... Assuming that the ECT1 is very close to the actual engine temperature, the operating temperature of this engine is between 80C to 85C (176F to 185F). This seems to be a bit lower than most other engines. Once it reaches operating temperature, its maintained no matter the driving conditions. Whether stop n' go, or even idling for 20 minutes. The gauge on the dash will just begin to register when the temperature hits about 55C (132F), and the temperature will be at about 75C (165F) when it hits the top. It seems that the thermostat only opens up when it reaches engine operating temperature because that's when the ECT2 (radiator coolant) temperature will begin to move up.
So far my fuel trims have never been positive, with the STFT has been averaging -5.5%, and my LTFT about -8%. I've been driving around with E0, and just filled up with E10 to see if it makes a 'positive' difference as noted by some here.
Below is a picture of the live display while driving. You'll also see two graphs. They're easily created with the output data. The first one is of all the live data I'm collecting, and the second one is of just the STFT-LTFT 'zoomed' in.
It will be interesting to see how the numbers change as winter approaches. I'm not only living in a (very) cold winter region, but am also on the edge of what Honda considers 'short distance' daily commuting.
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Can you read oil pressure? Battery charging amperage?FYI I have a scan gauge and it shows tranny temps above 200*F normally. I have seen 240F when loaded pulling a long incline. Also quite warm outside.