The ScanGauge II is an OBD-II
Scan Tool
Check for Diagnostic Trouble Codes
The
ScanGauge II can check for Diagnostic Trouble Codes (DTCs) and if
found, can display how many there are and the Trouble Codes
themselves. Using the internet or repair manuals, these can be
translated to the failed component and repairs can be made.
Data
captured when the Trouble Code was set can be recalled to help
troubleshoot the problems (was the temperature hot or cold, speed high
or low, etc.). The ScanGauge II can be used to clear the trouble codes
and data which will turn off the warning (Check Engine, Service Engine
soon, etc.) lamp.
Some
states now require that vehicle self tests have been completed since
the codes were last cleared, before running emissions checks. The
ScanGauge reports this "Readiness".