ISO - VPW

Most Asian, European, and Chrysler manufactured vehicles used the ISO protocol from 1996 to 2002. From 2003 to 2007 their vehicles will either support ISO or CAN. GM Vehicles almost exclusively used the VPW protocol from 1996 to 2002. From 2003 to 2007 GM vehicles will either support VPW or CAN. You can find out what protocol your vehicle is running with the ScanGauge by pressing MORE > MORE > MODE. Some sensors may not be reported by the vehicle. If you try all available XGauges for a certain sensor and it doesn’t report any data then the sensor is most likely not supported by the vehicle.