Electronic control unit problems

Electronic control unit: Engine Control Unit. It regulates all the aspects related to the engine's proper functioning.
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Mobilizer Active

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.
Timothy from Nigeria 3 years ago  
TI
13 reports 
Valcor from United States 7 months ago
I have this same experience. Any resolution?
Heba from other 7 months ago
Me too my car gives the message immoblizer active in the hot weather and it doesn't run until i open all doors and wait for the car to become cooler. I don't know how to fix it.
Comment

Car won’t start

Volkswagen Passat 2013 Saloon 102000 miles
Suspect ECU problem and cart does not start
Ahmed from United Kingdom 2 years ago  
AH

Emissions light

Volkswagen Passat 2002 Saloon.1. 6 140000 miles
Emissions light is on my 02 Passat Car is fine on idle is not great in morning time the rest of the day the speed is no problem responses after 3000 revs is good for a 1.6... should i have a ECU... checked for faults...
Scooby from Ireland 7 years ago  
SC
2 reports 
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