Q: Which oxygen sensor usually fails first? I don't have a code reader to tell which one is bad.

asked by on October 21, 2016

I just wanting to know which o2 sensor is more likely to fail first as I do not have a code reader
My car has a manual transmission.

Hi. In my experience, I haven’t really seen one oxygen sensor fail more than the other one. Considering the year of the truck, I would replace all the oxygen sensors on the truck because, if one is going bad, then the other oxygen sensors are right behind it.

Before you change the oxygen sensor, I would try and have the Check Engine Light diagnosed because what is causing the Check Engine Light could be something other than the oxygen sensor. I suggest you have a certified technician, such as one from YourMechanic, come and diagnosis your Check Engine Light and replace the oxygen sensor if needed.

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

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

Passenger side seat belts getting stuck.

Hi, The seat belt system is designed to lock if pulled out too fast or if in a fast stop. Inside the mechanism for the belt there is a ratching mechanism that controls this locking and is not serviceable at...

My cars RPMs rev up and down

Hello, and thank you for writing in. Typically when the engine behaves like this, you are looking at an air issue. You will want to focus in on the air intake, mainly the throttle and throttle position sensor. You may...

I'm am having issues with my truck when I get on the freeway. I can't go past 40 mph on the freeway.

Hi there. The EGR (exhaust gas reciculation) Valve needs to removed and cleaned out. If the engine continues to not drive faster than 40 mph, then I recommend replacing the EGR valve. If you need further assistance with your vehicle...

Related articles

The Best Used Cars to Buy If You’re a Realtor or Real Estate Agent
If If you make your living as a realtor or real estate agent, you may have a number of considerations when it comes to purchasing a used vehicle. The most common considerations are budget, ability to transport people, and comfort....
Where Is the O2 Sensor Located?
Oxygen Oxygen sensors O2 sensors will always be located in the exhaust system. Their function is to sense how much oxygen remains in the exhaust that is flowing out of the engine, and report that information to the vehicle’s engine...
The Best Used Cars to Buy If You Need a Lot of Trunk Space
Many Many people focus more on interior room than cargo carrying capacity. That’s natural if you have a large family or regularly carpool, but what about drivers who need to carry a lot of stuff most of the time and...