The error 020 occurs when no communication can be established with your diagnosis device.
The error 020 occurs when no communication can be established with your diagnosis device, and the technical information displayed is closed for safety reasons. Connect Jaltest Link to the PC, using the appropriate communication channel (USB or Bluetooth), and visualize the Technical Information again.
Please, check the additional information provided by clicking on the question mark icon on the error message as shown in the picture.
If the problem persists, contact customer support at (305) 960-7651 or email us at customersupport@jaltest.com.
We have officially rolled out our Advanced Technical Support (ATS). You may want to inquire about this high-level and valuable technical expertise support from our Jaltest Diesel Technicians!
Check these articles for information: