Finn Posted September 30, 2023 Share Posted September 30, 2023 Driving on motorway when buzzer sounded and code 4 came up, pulled in and steam comming from under bonnet.Looked it says air conditioning, but wasn’t on anti freeze low on header tank, any one know why Quote Link to comment Share on other sites More sharing options...
Vauxhall Owners Club Posted October 6, 2023 Share Posted October 6, 2023 Sounds like it could be a defective header tank pressure cap. Replace it and see if that resolves the issue Quote Link to comment Share on other sites More sharing options...
Finn Posted October 6, 2023 Author Share Posted October 6, 2023 thanks, had the header tank renewed before but obviously the cap wasn’t. Ordered from Amazon waste of space wouldn’t screw down , got one from gsf no problem went straight on . Thanks for the reply, yet the Amazon one looked exactly the same weird Quote Link to comment Share on other sites More sharing options...
Vauxhall Owners Club Posted October 10, 2023 Share Posted October 10, 2023 Yep thats about right for Amazon, they source rubbish from Asia and you get what you pay for really Can't go wrong with quality parts that cost more but don't need constantly replacing Quote Link to comment Share on other sites More sharing options...
Finn Posted October 10, 2023 Author Share Posted October 10, 2023 The part is exactly the same, you’re right it’s the first and last, friend changed the plugs on hi old Range Rover and the smoke coming out was unbelievable. Told me he got them from Amazon + other stuff every thing dumped and renews with quality parts now running sweet as a nut Quote Link to comment Share on other sites More sharing options...
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