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Poor fuel economy
Low — fix soon
Your car is using more gas than it used to, and you have to fill up more often, even though your driving has not changed.
Possible causes
- Dirty air filter — Most likely · Codes: P0171
Check first: Take out the air filter and hold it up to a light. If you cannot see light through it, replace it. - Bad oxygen sensor — Possible · Codes: P0130P0133
Check first: Notice if the check engine light is on and your mileage dropped all at once. A bad oxygen sensor makes the engine use too much fuel. - Underinflated tires — Possible
Check first: Check all four tires with a gauge. Soft tires make the engine work harder and burn more gas.
Questions, answered
What usually causes this?
The most likely causes are: Dirty air filter; Bad oxygen sensor; Underinflated tires. If you are not sure what is wrong, have it checked by a qualified technician.
Is it safe to drive with this symptom?
Usually safe to drive for now, but keep an eye on it and book a check soon.
Not repair advice. If you are not sure what is wrong, have it checked by a qualified technician. Cars differ by make, model and year.
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