I have a 2009 proceed ZR-7 1.4 petrol and the engine check light came on earlier this week. I have a diagnostic scanner and it was showing code P0172. I googled the code and it said that the air-fuel mixture was too rich and one of the possible causes was a faulty or dirty MAF sensor. According to other similar threads on this forum the sensor should be located somewhere between the air filter box and inlet manifold but I'm not seeing it anywhere in the engine bay. Could someone please post a pic or diagram showing where to look. Thanks in advance.