Skip the auto shop - Our mechanics make house calls

Q: Check Engine Light is on - 2007 Toyota Sienna

asked by on

When I make a test with scanner it give me p0037 code ?

My car has 246777 miles.
My car has an automatic transmission.

A: This code relates to a heated oxygen sensor...

This code relates to a heated oxygen sensor which is a unit inside your exhaust system that reads exhaust gases and relays this information to the car’s computer. The computer uses this information to make adjustments to fueling. This sensor needs to reach a minimum of 750 degrees F in order to produce an accurate signal. When this sensor is not working properly or not reaching the correct temperature, this can cause inaccurate signals to be produced. When this happens, this may cause the Check Engine Light to come on as you have noticed. I would suggest having an expert from YourMechanic come to your home to further diagnose your Check Engine Light and service your oxygen sensor as necessary.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: #4 spark plug blew out ( threads are now stripped ) and oil is blowing out the hole. Are the rings blown out ?

Motor oil can enter the combustion chamber through the valve guides, particularly if the valve stem oil seals are leaking, as well as past the rings. If there is a lot of oil, that would indicate a serious problem but...

Q: Code p0008

This is a general code associated with vehicle timing which can be caused by many different things such as: Engine timing out of sync Worn timing components (chains, gears, guides) Crankshaft or camshaft sensor malfunctions Wiring damage ECM software out...

Q: I am getting a P0171 code. It runs smooth and the fuel trim is good at idle. Under load the trim goes high.

If your fuel trims are ok at idle,but seem to climb when a load is applied to the engine the problem may be in the fuel delivery or air metering. A clogged fuel filter may disrupt the flow up fuel...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...