Best OBD2 – ScanGauge II Ultra Compact 3-in-1 OBD2 Automotive Computer with Customizable Real-Time Fuel Economy Digital Gauges

Description:  The ScanGaugeII OBD2 Code Scanner is a 3-in-1 automotive computer that combines a multifunction trip computer, diagnostic scan tool, and up to 37 digital gauges in one small package. It connects easily to your vehicle’s On-Board Diagnostic (OBDII) port and communicates directly with the vehicle’s computer. Not sure if your car uses OBDII or Controller Area Network (CAN)? The unit will automatically determine which system to use and switch to it. The ScanGaugeII works on all 1996 or newer OBDII cars, including gas, diesel, propane and hybrid vehicles, as well as vehicles with the latest CAN systems. A detachable cable allows for easy transfer between multiple vehicles. Its menu-driven operation means there’s no need to memorize complex sequences, and no tools are required for installation.

The ScanGaugeII has been redesigned with expandable Add-A-Gauge (aka XGauge) technology. Add to the original 12 gauges by customizing the ScanGaugeII to monitor up to 25 more–depending on your specific vehicle’s sensor design. Four gauges can be displayed simultaneously and can help determine fuel consumption rates, allowing you to adjust driving behavior and save gas. At the same time, keep an eye on coolant temperature, engine speed, and much more in real time. If there is a young driver in the house or friends borrow your car, the ScanGaugeII can record speeds of up to 158 mph and store the information for you to view later, so you will know just how fast your young driver or friend was going last night. If the unit was disconnected, you’ll know: An indicator will be displayed in the trip data.


ScanGauge II Ultra Compact 3-in-1 Automotive Computer Features and Reviews


Expandable add a gauge technology:

  • Horsepower
  • Fuel Consumption Rate to 1/100th per gallon/liter
  • Vehicle speed (MPH)
  • Fuel Economy
  • Cost Per Mile/Cost Per Trip
  • Manifold Pressure (not available on some vehicles)
  • Battery Voltage
  • Engine Load
  • Coolant Temperature
  • Throttle Position
  • Intake Air Temperature
  • Ignition Timing
  • Engine Speed (RPM)
  • O2 Sensor Data
  • Fuel Trim
  • Hybrid Battery Charge (for Toyota Prius and Ford Escape)
  • And many more, depending on your vehicle’s sensor design

Multi-function trip Computer:

  • Maximum Speed
  • Average Speed
  • Maximum Coolant Temperature
  • Maximum RPM
  • Driving Time
  • Driving Distance
  • Fuel Used
  • Fuel Cost
  • Trip Fuel Economy
  • Distance to Empty
  • Time to Empty
  • Fuel to Empty


There were a lot of reviews on the ScanGauge II Ultra Compact 3-in-1 Automotive Computer, and they were almost all positive.  One of the main things people liked about this scanner was the Fuel Consumption Rate Gauge and the Trip Fuel Economy features.  “Not only has it shown me how jackrabbit starts have impacted my mileage, but I’ve also learned the most efficient routes to take to and from work. Coming to work the way I’d always done cost me about $1.80. Taking a different route, even though it was off the Interstate and dealing with traffic lights, has shaved that to $1.41! The trips I took to the store were costing me $0.94 on my old route. With the new route it costs $0.73”.  The code scanning feature was mentioned often as well. “This little box is very useful. In my case it already paid for itself. I was able to clear some service codes (misfire of a cylinder). In the past I paid $69 for the mechanic to just look up and clear the code”.

There weren’t many negative reviews to read but there were a couple things to mention.  “The manual only promises operating temperatures down to 20 below”.  These tempetures don’t break this product but its not garaunteed to work in these conditions.  Other customers wished it had some features found in other OBD2 Scanners.  “it does not record and I cannot download the output to a spreadsheet”.

All in all this is a great tool for a car owner who wants to save money on gas and have a general run-down of all there cars systems while driving, and have a code scanning feature included.  But for someone who is trying find a problem with there car and potentially fix it, some of the other tools mentioned would be better for you.

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