Earlier this week I got code 154 A2- EGR flow too high
The ABS and Check engine idiot lights went on
Then later the ABS went out , strange, a self healing problem.
I seviced the two ground straps that looked cruddy on the back
of the engine, and haven't found the ground to the intake manifold yet.
Where is it?

Then I get check engine again after a day and get
(A2) 443 Cat Conv effiency low,
435 Slow front O2 sensor
154 EGR Flow too high again

What to do?

Also, Is there a check for the oil separator function without
pulling it?

Thanks, Bill