Car ran like toss this morning on start up, shaking and spluttering for a few min then ran fine once warmed up. Just had diagnostics on it and its thrown a Nox sensor code along with combustion misfire on cylinder 3 and 6.
To sort of cut out faulty injectors we deactivated each injector 1 by 1 and this all went ok.
Could a faulty NoX sensor cause misfires and a ****** start up from cold? What are the symptoms of a faulty NoX? Not too clued up with this VAG stuff, guessing it has something to with the fuelling though.