The following has happened a few times recently while driving.
ABS warning on
Traction control light on
Transmission light on
Speedo fails to indicate speed.
After around 30 seconds all is back to normal except transmission light but if I pull up switch off car and restart there are no warnings.
I have INPA when I plug it in there are no faults.
It has occurred during night driving in the rain so hoping it's a ground or battery (present one is at least 4 years old).
Where should I start to get to the bottom of it.
Cheers