O2 sensor, which one?

[boxster_nut]

As luck would have it, the day before I take the car for inspection the CE comes on.  The friendly folks at Auto Zone diagnosed it as a O2 sensor.  I don't recall the code at the moment, will follow up with that later. 

 

At first he was not sure if it was an 'upstream' or 'downstream' sensor....further questioning led him to say 'upstream' but not real sure he got it right.

So, where is the location of the 'upstream' sensor? 

Location of downstream sensor?

Are there only two sensors?

 

Is this a DYI in the driveway repair? am fairly handy with tools but is a lift needed?

 

A quick search shows bosch replacements - are they perform as well as OEM?

 

Thanks for your help

 

John

 

[JFP in PA]

As luck would have it, the day before I take the car for inspection the CE comes on.  The friendly folks at Auto Zone diagnosed it as a O2 sensor.  I don't recall the code at the moment, will follow up with that later. 

 

At first he was not sure if it was an 'upstream' or 'downstream' sensor....further questioning led him to say 'upstream' but not real sure he got it right.

So, where is the location of the 'upstream' sensor? 

Location of downstream sensor?

Are there only two sensors?

 

Is this a DYI in the driveway repair? am fairly handy with tools but is a lift needed?

 

A quick search shows bosch replacements - are they perform as well as OEM?

 

Thanks for your help

 

John

 

If you can get the car up in the air a bit, the sensors are definitely a DIY project.  That said, I would not be buying any until you have the code(s) as many O2 sensor codes are actually caused by something else.

[mikefocke]

Some O2 codes are very specific.  Depends on what year your car is as to if it has 2 or 4 sensors.

 

Know the exact code before throwing parts money after it.

 

Yes, Bosch makes the parts for Porsche.

 

More including a picture of the exhaust system, part numbers, etc here

[boxster_nut]

Code is p0153

Bank 2, sensor 1, h02s21

So where is bank 2 sensor 1????

[RFM]

Boxster: bank 2 = driver side (LHD)

sensor 1 = sensor in front of cat. (TWC)

Hope it helps.

[boxster_nut]

Some O2 codes are very specific.  Depends on what year your car is as to if it has 2 or 4 sensors.

 

Know the exact code before throwing parts money after it.

 

Yes, Bosch makes the parts for Porsche.

 

More including a picture of the exhaust system, part numbers, etc here

1997 boxster.  It has 2 cats, one on each side.  there is one O2 sensor between the maniford down pipe and the cat, on one sensor on the end of the muffler.  Each side is symetrical (e.g. 2 O2 sensors/side, 2 sides, total of 2 O2 sensors).  So now the question remains: for North American car, What side (driver or passenger) is Bank 2?? and where is Sensor 1 located? (between manifold & cat? or at muffler?)  Any help is really appreciated.

Thanks

J

[JFP in PA]

 

Some O2 codes are very specific.  Depends on what year your car is as to if it has 2 or 4 sensors.

 

Know the exact code before throwing parts money after it.

 

Yes, Bosch makes the parts for Porsche.

 

More including a picture of the exhaust system, part numbers, etc here

1997 boxster.  It has 2 cats, one on each side.  there is one O2 sensor between the maniford down pipe and the cat, on one sensor on the end of the muffler.  Each side is symetrical (e.g. 2 O2 sensors/side, 2 sides, total of 2 O2 sensors).  So now the question remains: for North American car, What side (driver or passenger) is Bank 2?? and where is Sensor 1 located? (between manifold & cat? or at muffler?)  Any help is really appreciated.

Thanks

J

 

 

 

Bank #1 is on the passenger's side of a Boxster, bank #2 is the driver's side.  Sensor #1 is the one closest to the engine.

[boxster_nut]

Now this is really amusing.....CEL stayed on after visit to AZone to check the code. They did not clear the code.  Orderd O2 sensor.  Drove car following day...light on in morning,  make a trip in afternoon, light is off....made a few trips the following day, light still off.  

I thought once the CEL was on, it would not turn off by itself.  Can someone explain this behavior?  Now I wonder if I really have a faulty O2 sensor.....

Thank you

-J

[JFP in PA]

Now this is really amusing.....CEL stayed on after visit to AZone to check the code. They did not clear the code.  Orderd O2 sensor.  Drove car following day...light on in morning,  make a trip in afternoon, light is off....made a few trips the following day, light still off.  

I thought once the CEL was on, it would not turn off by itself.  Can someone explain this behavior?  Now I wonder if I really have a faulty O2 sensor.....

Thank you

-J

 

Emissions related codes are capable of clearing themselves if the problem goes away for enough miles.  Only problem now is if or when it returns.

[boxster_nut]

 

Emissions related codes are capable of clearing themselves if the problem goes away for enough miles.  Only problem now is if or when it returns.

 

 

Really? OK, I never knew that, after all these years.  TYVM for quick reply.   I better get is inpected before light goes on again. lol

-J