Hello together I have a Chevrolet Matiz bj 2005 Get where the AGR valve was defective and also in the read out had shown me that it was the error. Now I went and had a new one installed and the errors were then gone. Only now when starting it goes and turns up to 1200 revolutions when it is cold and when I drive it goes up to 2000 revolutions and slowly when luck goes back to 1400 revolutions in the stand. The fuel consumption is therefore very high since the. Does anyone know if the AGR valve should be learned at the vehicle? Starting it does top. Only too high turning in the stand. This has all come only after the AGR valve replacement. chris