In the q5 i opted for the cheap version ($200) This does not have the ability to read ethonal, just the normal readings through obd2 port. on the A6 i bought the $250 version that included the option to run ethonal sensor.
They also have a $350 verision that allows supercharger loop pump controll, and fan controll. And a $500 version that allows logging straight to a micro sd card.
One of the main reasons i switched was the ease of adding an ethonal sensor. With both the p3 and cansensor you obviously will need a ethonal sensor, With p3 you also need a $85 voltage line adapter. Cansensor does not need this aditional part ( nor the headache of install, needing a power and ground source) The cansensor comes woth a wire harness woth 3 wires that simply connect to the 3 wires of the ethonal sensor harness , very straight foward.
Other reasons i had for switching is the amount of different parameters you can see on the cansesnsor vs p3. I will say you loose 0 to 60 timers, a/f gauge, and being able to see temps in F instead of C. BUT you gain more then 15 parameters to view.
Some of theese include:
1.Short term fuel trims ( see in real time what your o2s are doing)
2 Long term fuel trims
3 knock per cyl
4 oil / trans temp
5 specified vs actual boost
6 specified vs actual fuel pressure
7 low pressure fuel sensor and hpfp duty cycle
8 misfires
plus alot more
Reading ethanol on the a6

setup in the q5

Overall im very impressed with evry aspect. From the ease of install of the ethonal sensor, to the Long list of eaxtra parameters!
Cansensor Ig link and install doc with list of all parameters
https://docs.google.com/document/u/0...RL/mobilebasic
https://www.instagram.com/cansensor/?hl=en
Audi c7owners cansensor install/ review
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