Again – now in the right forum, I would like to apologize for the first mistake… so again.. Hello, with my agila a lights up and extinguishes the mkl sporadically, in damp weather more. Error selection says agr valve. My question, can you change it as not profi itself and must the cool water out for that? Thank you! For this Klemmi1997 already wrote: Quotation: Klemmi1997 Klemmi1997 Seat @lupo44 I mean that he does not have an AGR cooler. Yes you can change it yourself. Then remove the 2 to 3 screws and plug the plug off and remove the AGR including seal. Then clean the installation point with brake cleaner and clean it. Use the new seal on it and if available use the new screws and screw them down. Then reconnect the plug and turn on the ignition for 30 sec. And turn off again for 20 sec. Then start the engine. And you ended up in the Opel Adam Forum. Greeting Klemmi1997