Intermittent power loss

[L0wer]

Hi all.
Bit of a niggling problem.
This all started a couple of weeks ago.when given the old girl full beans I'd occasionally get a blink of eml and a split second of absolutely no power. Now I've noticed sometimes going over speed bumps I get the blink of eml and the power loss.

The cars a 2009 120d m sport
She sat doing nothing for a little over 2 years. Recently had full service new brakes some bushes etc etc I've looks for lose connections the eml is not storing any codes.

Any ideas people

Thanks Brad

[CrownGlass]

I would check the grounding strap between the engine and frame for excess corrosion or being loose/damaged.