I have a 2014 Isuzu MU-X and the service light keeps coming on. Isuzu says the fault is with the Vacuum Switching Valve, which are nil stock in Australia. I am meant to tow a caravan on holidays with my family of six very soon and the fault will not be fixed by then. Will I be causing more problems by driving the vehicle? I feel as though it is low on power when travelling uphill, which can't be good.
I wouldn’t go on a trip without fixing the issue. I'm surprised to hear that there is no stock in Australia, but I would reach out to Isuzu Ute Australia head office if you've only tried dealers so far.
UPDATE 12/2/19: Greg advises that this part was replaced under warranty shortly after this response was published.