(Solved) OPCOM Error: no communication with the ECM

Outils de diagnostic de voitures

Problem and customer solution of Opcom firmware 1.95 communication error

There is no communication with the ECM


Interface communication error, or interface not powered from car


Timeout occurred for Read Fault Codes Information!

Possible reasons are:

Ignition switched OFF

Communication error with the ECU

ECU is busy, or rejects request


U2201-00 CAN-Bus No Communication with EHU (Entertainment Head Unit)


Opcom interface: vaux-com 120309


Reply: Hi you have to verify your ground and 12 volts in your obd2 connector on the car .

Pin 4 5 ground and 16 +12 . Then you’ll have Opcom working like a charm

Hope it could help you.

(Credits to Dyno Thomas)