Skip the auto shop - Our mechanics make house calls

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?

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: No power to the fuel pump and the fuel relay is not getting power.

Hello. If you there is no power to the fuel pump or the relay, then there may be a possible electrical issue with the vehicle. I would first verify that the main EFI, fuel pump, and ignition fuses are not...

Q: I have a 2007 Infiniti G35 sedan, when pressing the pedal softly I get a slight delay in acceleration, and sometimes a small jerk

Hi there. Typically when an engine "bogs down", it is caused by a fuel or air restriction issue. Common components that can cause this are mass air flow sensors, MAP sensor, EGR valve, fuel injectors being dirty or clogged or...

Q: How do I adjust the cross rails?

If your vehicle is equipped with a roof luggage carrier, it’s a convenient way to expand your cargo carrying capacity. However, you’ll need to make sure you have the cross rails positioned correctly for your load. You can slide the...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...