Skip the auto shop - Our mechanics make house calls

Q: My car has check engine light on because of an oxygen sensor

asked by on

I am wondering how may oxygen sensors my car has. I am getting a check engine light for one of the sensors: Bank 1, Sensor 2. How can I fix it?

A: Hi there. Your car has two oxygen sensors. ...

Hi there. Your car has two oxygen sensors. Sensor one is located attached to the exhaust manifold, and sensor two is attached behind the catalytic converter.

The one you are getting is behind the converter in the exhaust pipe. Depending on what the code is will determine what needs to be done to fix it. Most of the time it is the oxygen sensor. I typically start by monitoring the sensors readings as it may also be a catalytic converter. This will produce a different reading with a scan tool than a bad sensor will. If you need to have this checked out, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the Check Engine Light and make any repairs that are needed.

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: P0016 and P0018 keep popping up.

Hi, thanks for writing in. These codes are both camshaft and crankshaft correlation codes. While these codes can be caused by a faulty sensor, more often they indicate a problem with the engine timing components. This could be anything from...

Q: Car is idling low at less than 1 RPM at a stop

Hi there. This may be a sign of a failing idle air control valve. The idle air control valve is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to...

Q: Stuck in first gear - 2001 Chrysler Neon

These codes reference a malfunction in the transmission assembly. The problem may be another sensor or an internal fault within the transmission. The best thing to do in this case would be to diagnose the gear issue and pinpoint the...

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...
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...
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...