Hi Guys Please can someone help me?! I have an Audi A3 1.6 2002. A while ago, the engine light came one, I checked for codes on a hand held diagnostic tool and it came back with problems relating to the Lambda Sensor. I changed the sensor and cleared the codes, but after a while the engine light came back on. I've cleaned out the EGR valve but it's still running rich. Could it be something to o with a temperature sensor, the ECU thinks the engine is cold so it's constantly running on choke? Its also idling at about 800 and hunts. And another.... The traction control light started coming on without me pressing the ESP button. Now its on constantly. I took all four wheels off and cleaned all round the hub and sensors as there was dirt all round them, could it bee I need to replace the wheel sensors? Please help me! Argh!