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easy things to check:

1. low tire pressure

2. excess weight carried in the car

3. Running the care w/ defrost or A/C on all the time

Engine possibilities:

1. May need fuel system cleaning

2. Oxygen sensor may have gone bad

3. Mass air flow sensor may have gone bad

4. Need engine tune up - spark plugs

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Q: What would cause poor gas mileage on Honda Accord 2004 6 cy?
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