Q: O2 sensors

asked by on

I have 2 bad o2 sensors. Bank 1 sensor 2 and bank 2 sensor 2. How do i know which ones to purchase? They usually have names like left or right upstream or downstream. Please help. Thanks!

My car has 183000 miles.
My car has an automatic transmission.

Bank 1 is the cylinder bank that has number 1 cylinder. In your case that would be the front bank. Each bank has two oxygen sensors, the upstream sensors are sensor 1 and the downstream sensors are sensor 2. So in your case, you need both downstream sensors. Replacing Oxygen sensors involves working underneath the car and requires some special tooling. If you decide you don’t want to do the job, Call your mechanic to schedule an Oxygen sensor replacement at your home and at your convenience.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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: Where is the transmission position sensor location on a 2000 Honda civic

Hello. This sensor is located inside of the center console if you are talking about the transmission position sensor. This vehicle doesn't have a transfer case so I am assuming that this is what you are looking for. If it...

Q: Why is my 1997 Nissan Maxima bogging down and stalling.

Hi there. Though there are a lot of reasons that will cause this most of the time on this vehicle it is due to a failing crank or cam sensor. both are common failures. I usually start by scanning the...

Q: My car has a coolant leak

Hello. The most common cause of a random coolant loss on this vehicle is a leaking intake manifold gasket. It commonly starts leaking coolant into the engine, which will be burnt off or will leak externally. I typically do a...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.