You can't. You need a scanner. Turn the key off then on again five times. The "check engine" light will flash the codes. You have to pay attention to the flashes. One flash means 1, two flashes means two, etc., etc. The codes can be found online.
The digital display is a long term average. You are checking it tank by tank.The digital display is a long term average. You are checking it tank by tank.
If you turn the key on and off three times in ten seconds, the system does a self check and flashes codes in the odometer. Done means it is done displaying codes, or there are no codes to display.
To change the digital display from mph to kph on a Ford Escape you push the small reset button near the odometer. This will change your mileage statistics from mph to kph.
There aren't bulbs in the digital display of a 94 Towncar. The whole cluster had to be replaced with a good one and needs to be calibrated to your mileage and such. Check with your local dealer after obtaining a replacement. I would start with a junkyard for replacements.
The EPA mileage estimate for the 2010 Dodge Grand-Caravan is 17 mpg in the city, 24 mpg on the highway.
The EPA mileage estimate for the 2013 Dodge Grand-Caravan is 17 mpg in the city, 25 mpg on the highway.
The EPA mileage estimate for the 2014 Dodge Grand-Caravan is 17 mpg in the city, 25 mpg on the highway.
The EPA mileage estimate for the 2008 Dodge Grand-Caravan is 17 mpg in the city, 24 mpg on the highway.
The EPA mileage estimate for the 2001 Dodge Grand-Caravan is 15 mpg in the city, 22 mpg on the highway.
The EPA mileage estimate for the 2003 Dodge Grand-Caravan is 17 mpg in the city, 24 mpg on the highway.
The EPA mileage estimate for the 2011 Dodge Grand-Caravan is 17 mpg in the city, 25 mpg on the highway.
The EPA mileage estimate for the 2009 Dodge Grand-Caravan is 17 mpg in the city, 24 mpg on the highway.