I have a problem with high fuel usage.
I seem to be using twice as much fuel as I should be. Even though according to the OBC I am running quite efficient eg highway driving at 90km/h I am using approx 8l/100km.
I suspect it may be a fuel leak but when I get under the car for a look I can't smell any petrol.
Would a faulty oxygen sensor cause high fuel consumption (running rich?) but I don't appear to have high fuel comsumption according to the OBC?
Where is the sensor for the fuel comsumption? If I don't have high consumption then I could have a leak between the fuel tank and the sensor.
Any other ideas?