Skip the auto shop - Our mechanics make house calls

Q: Check engine light

asked by on

Hey rocco, i have an 2006 scion xb. I got codes to replace the cat convertor, the upstream and downstream o2 sensors. I bought and replaced all 3. I put the freeway and highway miles on them. The computer reset but, the engine came back on. The down stream sensor code was on. I spoke to a few different people at the parts stores and mechanics. They said imports often cant use brands other than ntk or denso, besides oem. So, i looked around and found a denso four wire which , is what my care takes. I got the sensor but when i did a side by side comparison, they are a little different. Car has 2 white wires, 1 black, 1 gray. The sensor has 2 blacks, 1 white, 1 blue. I installed and put about 30 miles on it and cooled car down. Check engine light is on. What do i do and where do i get the exact sensor i need

My car has 100000 miles.
My car has a manual transmission.

A: Hello. If the harnesses do not match then t...

Hello. If the harnesses do not match then the sensor you have is incorrect. A search on my end also reveals that your vehicle uses a four wire sensor, however if the harness on the vehicle uses a 2 wire sensor, then that is what you will need to replace it with. I would try to retrieve a part number from the original sensor that was removed and see if a parts place may be able to match or cross reference it. Most aftermarket parts suppliers should be able to locate a sensor for this vehicle, however the dealer is another option if you want to be sure. If you’re unable to pinpoint the issue yourself, consider YourMechanic, as a certified technician can diagnose the Check Engine Light firsthand and help you install the correct sensor as necessary. Good luck.

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

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: Driver's side window not going up or down.

What the shop is talking about is that the mounting points for the window regulator that holds the window have stripped out, or are broken. Depending on how and what is damaged, repair may be possible. However, the opposite could...

Q: Is this a good car to own and what is the cost/reliability?

Hi there. Every used car can have unknowns. Scion is a product of the Toyota Motor Company and shares the history of reliability of said company. However, each car is only as good as the preventive maintenance that has been...

Q: Engine light on, loss of power. Lifted hood whilst engine running but fan doesn't seem to be spinning? Could this be the problem

The Check Engine Light indicates a problem in one of the vehicle systems. The stored trouble codes need to be tested and diagnosed. The electric fan should only come on when it's needed, if it is not necessary the fan...

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...