what is a bank 1 o2 censor

30

Asked by Oct 17, 2008 at 10:57 AM about the 1997 Saturn S-Series 2 Dr SC1 Coupe

Question type: General

5 Answers

95

For your car, it is the oxygen sensor located either on the exhaust manifold or shortly after it, before the catalytic converter. In case you don't know, oxygen sensors measure how lean or rich your engine's fuel mixture is in real time, letting the engine computer know whether it needs to increase or reduce the amount of fuel getting into the engine. They are quite reliable and last a long time, but eventually they fail and need replacement.

3 of 3 people found this helpful.
30

so bank one is the one befor the cats? there are 230,000 miles on this car and it just has a hard time getting started. Once you get it started it runs perfect. The diagnostic code said bank 1 O2 censor. Would this cause it to sound like it was flooding out when you are trying to start it?

3 of 3 people found this helpful.
345

There is bank 1 and bank 2 depending on the cylinders (this goes for any car) you will either have both or just bank 1. Four cylinder engines (such as yours) only have bank 1. There are however two sensors. Bank 1 Sensor 1 (Before the Cat) and Bank 1 Sensor 2 ( after the cat) On a v6 or v8 engine there will be Bank 1 Sensor 1 and Bank 1 Sensor 2. (Same idea as before but it will relate to one side of the engine. Then Bank 2 Sensor 1 and Bank 2 sensor 2 will be the opposite side of the motor. As for your vehicle, replace the front 02 sensor and you will be good to go. A bad o2 sensor can cause poor starting, bad gas mileage, among many other things.

1 of 1 people found this helpful.
50

How do I know which o2 sensor is bad?

5 of 5 people found this helpful.
50

Without an engine code?

Your Answer

Add photo

Related Questions

  • what is a bank 1 o2 censor 5 answers

    1997 Saturn S-Series 2 Dr SC1 Coupe

    -

    General

  • what is the switch on the console marked perf/normal for? 1 answer

    It is a little toggle switch next to the gear shift on the automatic

    1997 Saturn S-Series 4 Dr SL1 Sedan

    -

    General

  • Year identification on a Saturn SC 1 answer

    I drive a 94' SL2 and have been looking for a similar year SC2, while driving I spotted a first gen SC. The car was gold (ish) and the only other really distinguishable feature is that on the rear t...

    Saturn S-Series

    -

    General

  • What is wrong with my '98 SW1? 1 answer

    I have a 1998 sw1. It runs really well till recently. It's an automatic but it seems like some days when I step on the gas it doesn't shift properly and at times gets almost to the red on the tac ...

    1998 Saturn S-Series 4 Dr SW1 Wagon

    -

    General

  • what is the average lifespan of a 1996 satrun sl 3 answers

    it is a satrun with about 160,000 mile on it. I just want to know how much longer before it dies

    1996 Saturn S-Series 4 Dr SL Sedan

    -

    General

S-Series

Looking for a Used S-Series in your area?

CarGurus has 762 nationwide S-Series listings and the tools to find you a great deal.

ZIP:

Search Saturn S-Series Questions

Saturn S-Series Experts

#1 Alex Nazarian
Alex Nazarian
Reputation 1,510
#2 helpmeplease
helpmeplease
Reputation 1,040
#3 fabian_09_21
fabian_09_21
Reputation 890
View All

Related Models For Sale

Used Honda Civic
811 Great Deals out of 88,099 listings starting at $1,299
Used Ford Focus
633 Great Deals out of 57,258 listings starting at $795
Used Toyota Camry
1,104 Great Deals out of 90,757 listings starting at $1,599
Used Honda Accord
946 Great Deals out of 77,735 listings starting at $899
Used Toyota Corolla
860 Great Deals out of 70,584 listings starting at $1,874
Used Nissan Altima
1,156 Great Deals out of 79,666 listings starting at $500
Used Chevrolet Impala
591 Great Deals out of 34,068 listings starting at $899
Used Ford F-150
2,064 Great Deals out of 207,332 listings starting at $1,499
Used Ford Taurus
270 Great Deals out of 20,573 listings starting at $1,995
Used Nissan Sentra
501 Great Deals out of 52,618 listings starting at $2,000

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.