Question about 2003 Chevrolet Venture Passanger
I have a problem with the up stream O2 sensor that I am planning to change out. will this cause erronious reading from my fuel tank. the last time I ran out of gas I had 1/3 tank of gas with 75 miles remaining on my display. the fuel gage immediately drops from 1/3 tank to empty and the low fuel light comes on. the calculated fuel left also goes to low. the van will then run out of gas in the next mile.
The O2 sensor is in no way connected with your fuel gauge. Fuel float on sending unit in the tank is sticking (not sliding or pivoting up and down like it should) or the sending unit (fancy name for what is essentially a rheostat or potentiometer, a bit like a volume control. Wait until the tank is empty or near empty, gas is heavy. Drop the tank (careful of the wiring and note where they all go). Carefully remove the sending unit and inspect it by operating the float mechanism and see if it sticks about 1/3 of the way down or not. If it isn't sticking and there isn't something like a broken baffle in the tank interfering with the float and the connections were good, replace the sending unit.
Posted on Jan 16, 2012
02 sensors read the exhaust fumes and then adjust the car's air/fuel ratio by means of the car's computer. IF the gas guage is off, that would be the sending unit in the gas tank that is sticking
Posted on Jul 01, 2009
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Posted on Jan 02, 2017
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