The OBDLink® app evaluates how your vehicle meets certain emissions standards for your state (vehicles in the United States only). Follow the steps in this article to select your state and review the monitor results.

Note: We recently updated the OBDLink app and made improvements to its features and how it looks. This revised article matches the updated app’s screens and features. Download the latest version of the OBDLink app from the App Store (iOS) or Google Play (Android) to take advantage of the updated app's features and performance. 

Before you begin, be sure to: 

  • Start your vehicle.
  • On your phone/tablet, open the OBDLink app and connect to your OBDLink adapter.
  • Make sure your phone/tablet is not streaming to any other Bluetooth/BLE devices.
  1. Confirm that your phone/tablet is Connected to the OBDLink adapter.
  2. On the Home screen, tap Monitors.
    iOSAndroid
    iOS screen with Connected and the Monitors icon both highlighted.
    		Android screen with Connected and the Monitors icon both highlighted.
  3. You will see the I/M Readiness tab. Note: If you are not connected to your vehicle, no results are displayed.
    Select the readiness standard for your state. Not all states have a readiness standard, so your state may not be in the list. The default readiness standard is None.
    Tap the 3 horizontal dots (iOS) or 3 vertical dots (Android) menu button in the upper right corner to display the menu options, then tap Readiness Standard.
    iOS Monitors screen showing the I/M Readiness tab. The tab name and Menu button are both highlighted.
    		Android Monitors screen showing the I/M Readiness tab. The tab name and Menu button are both highlighted.
    iOS Monitors screen showing the I/M Readiness tab Menu options. The "Readiness Standard" option is highlighted.
    		Android Monitors screen showing the I/M Readiness tab Menu options. The "Readiness Standard" option is highlighted.
  4. Select the readiness standard for your state and your vehicle's model year, then tap OK.
    In the examples below, we selected an Arizona vehicle from 1996 and None (the default ).
    iOS Readiness Standard screen showing a list of states.The option "Arizona 1996 to 2000" is highlighted. The OK button is also highlighted.
    		Andriod Readiness Standard screen showing a list of states.The option "None" is highlighted. The OK button is also highlighted.
  5. You will see a list of monitor test results. Scroll down to see the complete list.
    iOS I/M Readiness screen showing monitor test results. The tab name is highlighted.
    		Android I/M Readiness screen showing monitor test results. The tab name is highlighted.

  6. Tap O2 Sensors to view the oxygen sensors tab.
    This tab shows oxygen sensor data for vehicles that are earlier than model year 2008 and don't use the CAN bus.
    (This data is also called Mode $05 data.) Newer vehicles will show oxygen sensor data on the On-Board tab.
    The screenshots show examples of vehicles that don't support oxygen sensor test results.

    iOS Monitors screen showing the O2 Sensors tab. The tab name is highlighted.
    		Android Monitors screen showing the O2 Sensors tab. The tab name is highlighted.

  7. Tap On-Board to display the on-board monitoring tab.
    You will see a warning message similar to the one shown below. Tap Yes when you’re ready to continue.
    This tab shows oxygen sensor data for vehicles that are model year 2008 and higher and use the CAN bus. (This data is also called Mode $06 data.)
    Scroll down to see the complete list of On-Board test results.

    iOS Monitors screen with the On-Board tab highlighted. A warning message is displayed. The Yes button is also highlighted.
    		Android Monitors screen with the On-Board tab highlighted. A warning message is displayed. The Yes button is also highlighted.
    iOS On-Board tab showing sensor data. The tab name is highlighted.
    		Android On-Board tab showing sensor data. The tab name is highlighted.

  8. Tap Vehicle Info to view the vehicle information tab.
    You will see a warning message similar to the one shown below. Tap Yes when you’re ready to continue.
    This tab lists details about your vehicle. (This data is also called Mode $09 data.)
    Scroll down to see the complete list of information.

    iOS Monitors screen with the Vehicle Info tab highlighted. A warning message is displayed. The Yes button is also highlighted.
    		Android Monitors screen with the Vehicle Info tab highlighted. A warning message is displayed. The Yes button is also highlighted.
    iOS Monitors screen with the Vehicle Info tab highlighted. Vehicle information is displayed.
    		Android Monitors screen with the Vehicle Info tab highlighted. Vehicle information is displayed.


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