Hello, What would you advise if our moose always lights up the exhaust gas cleaning symbol? According to the manual, it is supposed to be a fault in the exhaust gas cleaning system of the vehicle and it is recommended to check the error in the next Volvo workshop. This error has disappeared for a few days after a new firmware has been installed in the Volvo in connection with installation of the trailer coupling… I fear that this can be done with the Lambda probe. n… and these have to be changed… Greetings and thanks for your advice and experiences…