Mode $01 — Request current powertrain diagnostic data
- The purpose of Mode $01 data is to have access to current live powertrain data values.
Mode $02—Request freeze frame information
- The purpose of Mode $02 is to allow access to emissions-related data that is stored at the time the related code was set.
Mode $03—Request emissions-related diagnostic trouble codes
- The purpose of Mode $03 is for the external test equipment (scan tool) to have access to emissions-related Diagnostic Trouble Codes (DTCs) that are stored in emissions-related modules.
Mode $04—Clear/reset emissions-related diagnostic information
- The purpose of Mode $04 is to clear the emissions-related diagnostic information from the modules that have stored this information. This function includes clearing not only the DTCs; but also the freeze-frame data, all stored test data, and it resets all monitors and turns off the check engine light.
Mode $05—Request oxygen sensor monitoring test results
- The purpose of this mode is to allow access to the engine control module’s oxygen sensor monitoring test results. The same information can be obtained by the use of Mode $06. The Mode $05 information is not available on vehicles using the Controller Area Network (CAN) system. For those cars, you’ll need to go directly to Mode $06.
Mode $06—Request on-board monitoring test results for specific monitored systems
- The purpose of Mode $06 is to allow access to the test results for on-board diagnostic monitoring tests of specific components that are both continuously monitored (misfire monitoring) and non-continuously monitored systems. The Mode $06 test information has nothing standard between vehicle makes or models. The only way to understand what you are seeing is to either have a scan tool that defines all of the data for you, or to print out the Mode $06 information from service information then compare the printed data to the scan tool data.
Mode $07 — Request emission-related diagnostic trouble codes detected during current or last completed driving cycle
- The purpose of Mode $07 data is