Reading Diagnostic Trouble Codes

TDN can query vehicles for Diagnostic Trouble Codes (DTCs) and emissions readiness monitor statuses. Follow these steps:

1. Tap the DTC button on the navigation bar. The DTC screen appears.

2. Connect an MPVI2/2+ to the vehicle and start the ignition.
3. Tap the READ CODES button. The TDN app will begin scanning for DTC codes. When finished, it will display a report like the one shown below.

Graphical user interface Description automatically generated

4. If you want to share this report, tap the SHARE button at the bottom of the screen and then select the person, email account, or other resource with which you wish to share it.