Skip the auto shop - Our mechanics make house calls

Q: Overheating - 2006 Toyota Sienna

asked by on

Toyota forces water out through overflow , then heats up. Not radiator cap problem. Someone suggested compression leak. If this is problem, should computer throw off a code to reader?

My car has 145000 miles.
My car has an automatic transmission.

Hi. The computer probably won’t throw a code for a compression leak. If the compression was that bad you would get a misfire code from the computer. I think you have a clogged radiator or heater core causing your problem. These parts I would suggest replacing first. The worst case scenario is the head gasket is blown causing the coolant to come out of the over flow. A compression test and head gasket test will determine if the head gasket is blown. If you need help with this, a certified technician from YourMechanic can come to your car’s location to inspect the overheating issue and advise you on the correct repairs.

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!
  1. Home
  2. Questions
  3. Overheating - 2006 Toyota Sienna

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car vibrates while accelerating

You might have a bad engine mount. Vehicles with transverse engines usually have 3 engine mounts and 2 transmission mounts. Some also have torque mounts. The mounts isolate the engines vibrations. When the insulator on the mount tears, the engine...

Q: Why does my car takes about 10 minutes to warn up everytime it sets for a couple of hours

The thermostat may be stuck partly open if it takes longer to warm up than it used to as long and the outside air temperature is not below freezing. If outside air is very cold than the engine would cool...

Q: Car started overheating two days ago. Changed the thermostat and the water pump, still overheating 1998 Chevy Lumina

Hi there - you may still have a problem with a clogged radiator, or the auxiliary cooling fans are not coming on properly. I recommend a engine overheating inspection performed by a mobile, professional mechanic, such as one from YourMechanic,...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...