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Hi,
have an Arteon 2017 with a 2.0 Dual Turbo TDI (CUAA) which have started to overheat in an intermittent way, not always.
Happens only when run the first time of day
Happens not always, just some 50% of times.
No fault codes related to engine on OBDeleven
When coming close to alarm level temp can be reduced by setting full heat to cabin.
Once temp has been reduced by heating cabin once or twice it works perfctly the rest of the day, with multiple restarts.
Temp issue is not related to engine load.
Fan is working

What can it be?
 
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