I bought the Nitrod:
http://www.nitrod.com/product.html
Works great, just read the incidentals.
Turn-Off Check Engine Light ( 
) & Delete DTCs The VPM-100G can clear the DTCs from your vehicle’s ECU and turn-off the Check Engine Light (CEL). The CEL is the visual flag raised by the ECU to indicate that a system or component malfunction was detected.- Displays and Logs Real-Time Vehicle Sensor Data The VPM-100G displays sensor data with digital gauges or on Cartesian graphs. The data is obtained directly from the vehicle’s Electronic Control Unit (ECU). The graph displays, plot the sensor values versus time. The plotting can be paused at any time for you to review the logged values using a scrolling marker. For example, the plotting function comes in handy when determining the health of your vehicle’s oxygen sensors by observing their oscillating voltage signal as a function of time.
- Factory Wide Band O2 Sensors (A/F - Lambda)
- Air Intake Manifold Pressure (Vacuum/Boost)
- Mass Air Flow
- Engine Coolant Temperature
- Air Intake Temperature
- Narrow Band O2 Sensors
- Battery/Alternator Voltage
- Tachometer & Vehicle Speed
- Spark Advance
- Long- and Short-Term Fuel Trims
- Throttle Position
- Engine Load Value