There was a TSB on this a while ago but cant seem to find it . This explains ,
"The Code 3 message on your Vauxhall Insignia does indeed relate to an issue with the coolant and a possible leak that may be caused by some cracked housing around the EGR valve.
Vauxhall did release a Technical Service Bulletin (TSB) some time ago that addressed this known issue. Rather than having to replace the EGR, the TSB repair kit allows the housing to be repaired - at a much smaller cost.
If you're seeing the Code 3 message, you need to book your car into your local garage as soon as possible as the coolant system is pressurised and should not be leaking."
Posted Oct 15, 2019 (5 years ago)
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