Skip the auto shop - Our mechanics make house calls

Q: Exssesive fuel consumption

asked by on

my 2008 toyota sienna is consuming way too much fuel... I don't see any leaks anywhere, what can the problem be? pleaseeee help!!

A: If you are suddenly having poor fuel mileag...

If you are suddenly having poor fuel mileage then you should also have a Check Engine Light illuminating. The light will most likely be indicating a problem with a sensor like an O2 sensor or a mass air flow sensor.

If you do not have a Check Engine Light on then you may just need to do some vehicle maintenance that will help the vehicle get better mileage like: replacing the air filter, cleaning the mass air flow sensor and throttle body, replacing spark plugs and make sure all the tires have correct amount of air every month. These simple services can increase your mileage if maintained on a regular basis.

If you'd like to get the car looked at, consider YourMechanic, as a certified technician can diagnose your potential Check Engine Light or perform any of the aforementioned maintenance tasks as necessary. Good luck!

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Accelerating

If your Check Engine Light is on, you could have a misfire caused by a faulty ignition component. It could also be caused by improper timing, if the timing belt jumped a tooth. It could also be caused by a...

Q: cant figure out why right passenger side wheel wobbles when I hit 35-45 miles.

Try to put the the vehicle in neutral when you feel the vibration to see if the vibration goes away and comes back when put back in drive. If the problem goes away then you may have a defective axle...

Q: Blown engine

Check you dipstick to make sure that the proper amount of oil was installed. It's possible that someone forgot to re-fill the engine oil. It could also just be a coincidence that the Check Engine Light came on after the...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...