Hello, what could be wrong, if my obd II cant communicate with engine module, other modules are communicating, like abs, AWD etc

From memory all the diagnostic "K" wires are spliced together behind the AC control panel area, might pay to check nothing has been disturbed in that area

Hi I have a similar problem with Mk2 2l TDI Octavia Scout, where there is no communication to the engine ECU, fuses all check out ok, and the car was working ok on Friday but came up with skid warning as well.

So do you have any solutions?