Malfunction indicate lamp was on (check engine light). Had it repaired by VW dealer three weeks ago. The dealer changed Mass Air flow (MAF) sensor. The city I am living (in Canada) requires to do emission inspection every two years for enviromental consideration. Two weeks after replacing MAF sensor (Jun 2004), I went to do emission inspection. The car passed it at a small margin. Here is the results:
Result in 2004--- Result in 2002 ---Average passing reading Hydrocarbons ------ 0.0911------ 0.0485-------0.0403 Carbon Monoxide ------4.0985------- 0.0132------ 6.2100 Oxides of Nitrogen ------0.0630------- 0.0094------ 0.9300 Unit: g/km
The emission is very high. I am not sure if it can pass next time. But it seems very strange since the number is so high compared with average passing reading and that two years ago.
Anyone can tell me if the MAF adjustement affect the emission? is it possible to ask the deal to repair it again? Or any suggestion for that?