[iamwiz82]

I use a ScanGauge. It also runs as a gauge pod for my other car. It shows intake temperatures, water temperature, voltage, and boost pressure. I can disconnect it and check any of my vehicles in about 30 seconds.

 

[iamwiz82]

Hadn't come across that one. Does it require programming or is it plug and play?

It's plug and play other than a few settings. You can also custom code anything that OBD-II would be reporting. AFR, transmission temps, etc. As long as the vehicle has a sensor reporting it can do it, in theory.