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・Save up to 30%

Get a quote

What others are asking

Q: My sunroof is leaking.

There is a technical service bulletin (TSB) regarding your concern. A trained professional, such as one from YourMechanic, can inspect your vehicle to see if the TSB applies. if it does, they can perform the steps outlines in the procedure....

Q: Replaced EGR valve and cleaned the intake but the P0401 code is still coming up after reset

Hi there. From the description you have given, your vehicle's P0401 (EGR insufficient flow) code may be a control problem. Assuming, the intake passage cleaning was successful. Good intake manifold vacuum is present at the EGR (exhaust gas recirculation) valve....

Q: Check Engine Light staying on

Your engine may need a tune up. Your engine, in addition to spark plugs and wires, also has a distributor cap and rotor that need to be replaced as part of a tune up. Commonly, over time, the metal parts...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.