Volkswagen Passat 2006 2.0T Automatic Fuel 169650 miles
So i recently got this well used Passat 2006 2. Ot Fuel but the Immobilizer Active message display which wouldn't let the vehicle come on could drive a sane person insane. I notice this becomes very intermittent during the day time when the weather is high as it rarely happens in the mornings and evenings. A technician advises me to change ECU which i did , vehicle runs for 3 days displaying different incompatibility signs and finally parks up after 3 days. Now i am back to old ECU with very intermittent Mobilizer Active messages. Anyone has an idea how to manage this ?
Thanks to hearing back.