Lambda Sensor Error
I can clear the code (I have APR software and VAG com) shortly after start up and the code does not come back while driving. However, at the next start up, it appears.
I recently had the Aux Coolant pump replaced, I know a lot of things are disconnected and reconnected. I am also getting an intermittent rear driver door ajar, that I never had before the service.
1st question - is it likely this new error is related to the recent service?
2nd question(s) - how do these typically fail? Why the error only at start up.
Thanks in advance.




