[CmdY53]

I told you to check the temperature in odis or vcp, not the fault code. Have you changed both sensors? And does the fans work at all? Because both fans should operate when overheat... And you will see engine temperature i when you check like I wrote...

Have you changed waterpump when replace the camshaft-belt?
May blown head gasket is an solution, check oil-stick for grey /brown oil color..

I'm gonna do the tests you said and return