Skip the auto shop - Our mechanics make house calls

Q: O2 sensor

asked by on

My engine light came on and I ran the code 2031 and its on the bank 1 sensor 1. How do I know where my bank 1 sensor 1 is located?

My car has 106000 miles.
My car has an automatic transmission.

Hey there. Oxygen sensors are located in the exhaust system, typically before and after the catalytic converter. Bank 1 is found on the driver’s side - if the engine is a V6 or V8. On a 4 cylinder, it would be the only one. Sensor 1 is considered the sensor between the engine and the inlet of the converter. Sensor 2 is the sensor after the converter. If you need help having the oxygen sensor replaced, a qualified professional from YourMechanic can come to your home or office to perform this repair.

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: I went to buy a 2010 Volkswagen Passat Komfort from a dealer and he couldn't get the gear shift out of park is this a serious prob

There is a safety interlock that prevents inadvertent engagement of the transmission. Typically, you have to have your foot on the brake to free up the shifter. The interlock could have a fault and, if so, the failure is probably...

Q: My car has an engine check light orange in colour

You will need to have the Check Engine Light diagnosed by having the computer scanned and any codes diagnosed. Be aware that O2 sensor codes may not be an O2 sensor failure but an engine running lean or too rich....

Q: check engine light

When the radiator broke, the engine coolant sensor or other sensors may have set a code in the computer. These codes and the Check Engine Light will not go away until the vehicle is scanned and codes cleared if repairs...

Related articles

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.