Hi friends, I wonder if anyone can help me. I have a CLK 200 and keep getting the engine management light on with the computer reading "Open Circuit P0130 Oxygen Sensor Upstream" I have changed the Oxygen sensor and even the Air mass sensor and it still comes back after a day or 2. I have niticed that it comes on when going around a bend and once when I went over a bump. I have sat in the car on a ramp while my mechanic shakes and moves wires and it doesn't happen then, he also wiggled all of the vacuum tubes for the EGR and tubing for induction system while the engine was running as well. After a reset the light comes back on a couple of days later. It's cost me a fortune and is driving me mad, does anyone have any ideas ? Many thanks. Steve
P.S I have posted this before and had no luck, I'm desperate and I hope you don't mind me asking again.