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best of both · 02-24-2007, 08:33 PM

Without knowing the codes it may be o2s. You also want to check the coolant temp. A lot of fuel mileage issues show up in the cold weather due to the coolant temp being low. Dont trust the guage use a scan tool or thermometer.

02-24-2007, 08:33 PM	#3
best of both Join Date: Apr 2006 Posts: 82 iTrader: (0)	Without knowing the codes it may be o2s. You also want to check the coolant temp. A lot of fuel mileage issues show up in the cold weather due to the coolant temp being low. Dont trust the guage use a scan tool or thermometer.