I'm learning to diagnose my car's poor gas mileage:
Car: 2010 Toyota Matrix (Base). Engine: 1.8L, 4 cylinders, Auto, FWD. ODO: 103,000km (64,000 miles). City gas mileage: 12.6L/100km = 18.6 mpg (advertised City gas mileage is 8.1L/100km = 29 mpg)
Photo attached is data for AF, O2 sensors and Fuel Trims at idle (please click on the photo to expand the full data).
Please advise me: (1) if everything is normal or not? (2) if any other data should be read?