Car Audio / Electrical / Security / Diagnostic Rel
Insignia SRi 2016, 1.4T, 20,000 miles.
The car slows down and then speeds up on its own, eventually the ABS/ESC warning lights come on, along with the ESC service message and they remain on all the way home.
This is associated with 50 mile journeys via the Motorway. All but one time, I reached...