Hi all hope someone can help thanks. 307cc 2ltr diesel 6 speed. Depollution system faulty and engine management light came on. Noticed car was struggling up a hill when this happened. Looked it up said to give it a good run on motorway and 4th gear. Did that then went to mechanic, cleared the fault to see if it workex and did for a day or so. Fault came back but also car is jerking through 1st to 3rd gear and definitely using more fuel. Any ideas. Mechanic isn't sure. He rang Peugeot they don't seem to be sure either.