Dear customer, I see your query and it is clear that you are not making a good diagnosis with a suitable equipment, and it is best not to proceed to make any replacement, because you might lose money, perhaps even when you replaced the coil package and installing the new battery, it was not necessary.
When we have indicators activated on the dashboard, it is a product that the models in charge of each indicator receive an altered signal from one of the sensors or actuators of the system, in your case you present indicators referring to the esp, this is the vehicle's stability system and the another of the steering, which are directly related to each other.
So, the first thing you should do is a computerized diagnosis with the correct equipment, that is, with a diagnostic equipment that has the Astra Vauxhall software, the loss of power you experience is the result of a limp mode due to precisely these indicators lit. When the correct equipment is entered and the error codes of these systems are reset, the indicators go out and the problem disappears.
The generic equipment cannot access these codes because the indicators you present are from modules other than the engine, and generic equipment can only enter the engine error codes nothing more, therefore, they do not receive error codes .