Hi all,

New to site. Just bought an 04 Aveo LS four door sedan. Picked up car with near empty tank ( No check engine light. Filled with gas, drove about 100 miles and check engine light comes on. Went to Auto Zone they put a scanner on it and up pops P0423 code ( Fuel Level Sensor A Circuit High Output ). Drove car about 125 miles total. Once fuel got to 1/2 tank on fuel guage check engine light went away. Does this sound like a bad fuel sending unit ? If so can you get to the sending unit under the back seat or do you need to drop the tank ?

Thanks in advance for any advice