v157 fault code

Hi all, got back from a 3 week detachment yesterday my mate had been running the car for me while away, it really struggled to start then when it did i had a exhausht problem fault light on the dash and electric windows would not work, reseated window fuses and they started working again but fault light stayed on, put my laptop on car this morning started engine was a little difficult to start which i thought strange after a 2 hr journey yesterday so battery probs on way out, it is the standard batt car came with some jap ****, warning light has gone out but fault code v157 19558 intake manifold motor flap came up can anyone tell me where this is so i can have a butchers, location on car a pic would be awesome thanks.