These can be problematic,
bare minimum diagnostics system just has to be dealer qualIty,
generic scan tools just aren't accurate so Vauxhall scan tool like "TECH II" ARE NEEDED.
If your previous garages didn't have these then i'm not surprised by their lack of success.
But anyway,
clearly it's temperature related,
so disconnect the coolant temperature sensor and try running it,
The ECU will just substitute a value from it's memory but this will generate a fault code,
What were looking for is a change in status,
is it any different?
Though even this might not be conclusive,
most faults I've found on these have been wiring/connector faults.
It needs scanned with the right scanner..
Posted Jul 17, 2015 (9 years ago)