Been having grief with my Astra for some time (Z16se)
It has a rough idle and an intermittent fault with the throttle .
After a few miles down the road (anywhere between 2-30miles)the spanner will appear on the dash and go into limp mode.
I've replaced the pedal , throttle body, map sensor , cleaned all breathers etc.
Could the problem be an earth or has anyone experience with the wiring to the pedal ?
Any help would be greatly appreciated