Hello my loved ones I had my gearbox changed and I was then checked the errors gas injection and exhaust system checked. The workshop said that it was because the battery was disconnected and would go away again on the journey home. After more than 300km the errors were still there and I called again. I should have the errors read out and deleted. Today I borrowed an OBD device and said. After a test drive was the Fe Hler exhaust system check disappeared but the error gas injection check appeared again (3x made – just in case).. Error message DF652. Add the pictures. Is the sensor with the voltage 4.75V, which I read out, the correct ? Can this be a mass error and can I do there without pit / lifting platform itself what ? Best regards your Rudi