Q: Warning lights on the dash are always lit up

asked by on

I keep having random lights pop up on the dash of my 2007 Toyota RAV4. Even though I just barely passed 30,000 miles in the car, the O2 sensor keeps sending out bad signals or something and makes me think something has broken. Even if I know the problem, if the check engine light is always on, I won’t know if something else has gone wrong! I replaced the sensor once and the last thing I want to do is spend the money to replace it again only to have it go bad. What can I do?

The O2 sensors on on this vehicle are a known issue, and generally speaking when the O2 sensors go bad they affect the Stability control system. There have been multiple instances of these sensors failing on Toyota’s between 60-70K miles. The general life expectancy of an average O2 sensor is around 100k miles depending on usage of the vehicle. You can reference Technical Service Bulletin (TSB) T-SB-0398-09 to help with identifying which O2 sensor is bad based off of the diagnostic code. Please also be aware that sometimes even though a system is showing as defective it may not always indicate the part is bad, just that the system the part is included in is having an issue. It could be wiring, bad fuel or a combination of these items. If you continue to have issues with the malfunction indicator light (MIL) light coming on, consider having a expert mechanic service, such as Your Mechanic, come out to diagnose and replace your oxygen sensor if needed. Additionally, if you take your vehicle to a dealership and provide your VIN, they can give you a list of recalls and TSB’s that affect your particular vehicle, one of which may also address the issue you are having.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Warning lights on the dash are always lit up

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: My car is not driving smooth as I feel hard acceleration but only at low speed i.e 40 km/hr

Hi there. This presents an interesting situation and I completely understand how you feel. It's almost like now that something has gone wrong, you wonder what else is going wrong with the car? And it doesn't feel like it should....

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: Where is the map sensor located c

The MAP (Manifold Absolute Pressure) sensor should be located just in front of the throttle position sensor toward the back of the left side of the engine (assuming you are standing in front of it facing it). If you have...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...