Why is the ecu on your vauxhall corsa full of oil?

There should not be any oil in the ECU of your Vauxhall Corsa. If there is oil in the ECU, it is likely due to a leak. This could be caused by a number of factors, such as a damaged oil filter, a faulty oil pump, or a cracked oil pan. It is important to have this issue diagnosed and repaired by a qualified mechanic as soon as possible, as oil in the ECU can cause damage to the electrical components and lead to costly repairs.