If you can talk to the Engine (DME) but nothing else, try disconnecting non-essential modules one by one (like the radio or CD changer) to see if communication returns. 5. Firewall or Antivirus Interference
Ensure the cable is fully seated and the ignition is in the "ON" position (dash lights lit). Configure COM Port Settings: inpa error 159
If you can talk to the Engine (DME) but nothing else, try disconnecting non-essential modules one by one (like the radio or CD changer) to see if communication returns. 5. Firewall or Antivirus Interference
Ensure the cable is fully seated and the ignition is in the "ON" position (dash lights lit). Configure COM Port Settings: