ECU problems
ECU: Engine Control Unit. It regulates all the aspects related to the engine's proper functioning.
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Top problems
Ecu fuse blown up immdiatly YOU replace
Volkswagen Polo 2021 Hatchback 220000 miles
Fuse of an Ecu always blow up when u replace IT
2 reports
Not starting - Only crank 
Solved
Volkswagen Polo 2008 hatchback - 1.4 90 miles
I have a very elusive issue with my car which I just can't seem to diagnose. :(
My Polo 9n3 2008 1.4 randomly doesn't want to start anymore. When I turn the key the engine simply turns over and there is no click or buzzing noise from the fuel pump. The dash electronics function perfectly. I have removed the fuel pump and tested it, it works perfectly, however the cable powering it only measures 3.5v. The car battery measures 12v. I checked the spark plugs and they are dry- so the engine is not flooded.
On suspicion that it is the immobiliser, I checked my key fob battery and it is good. I ha… Read complete
11 reports
Junior rueiner from other a year ago
Em último caso, verifique as conexões dos fios, e aterramento. Plugs, encaixes dos fios, verifique se tem fio corroído(ratos podem descascar o fio, e a ação do tempo oxida o cobre presente no fio, fazendo pegar energias vezes sim, e as vezes não), limpe as conexões, plugs, etc com spray limpa-contatos, é provável que a situação na qual vc esteja passando seja problemas elétricos relacionado a fiação
Any luck? Am having the same problem on. My Polo vivo gt
Best answer (according to Andre)
Hi all, I managed to solve the issue. It turns out the ECU was faulty and needed replacement due to the fact that the previous owner had replaced the original ECU which was not fully functional and therefore had to bypass the immobiliser to make it work. The bypassed issues in the ECU were then aggravated over time with exposure to heat and vibration and ultimately resulted in the need for complete replacement.
CommentEpc goes no than you get no throttle
Volkswagen Polo 2014 Hatchback 186000 miles
Epc light goes on car goes into a limp mode than you get no throttle, after switching the car on and the on than you get throttle but only for a short period of time than it does the same again can it be the sensor coming from the ecu
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