Jason's 99 Boxster doc thread

[Radman]

Originally Posted by blue62

So first things first
Generic O2sensors are well known for their non compatibility with Porsche systems.
Secondly:
All four codes are pointing to the same thing: This is how it is described in the Bentley Book.
"Short to ground/below lower limit/lean mixture threshold."
So basically three possibilities.....but sense you have used generic brand sensors I would suspect an electrical issue with the sensors......the short to ground.

So first replace the 02sensors with Bosch.....
They developed the first automotive O2sensors so they know what they are doing.
Then go from there as a good starting foundation....

If you eliminate your cats and post O2sensors you will likely always have a check engine light on unless you find a work around..So if you have an OBDII issue you will not know it because the check engine light is already lit.

If you want to learn about "fuel trims" or O2sensor signals and how to read them and how they are related to each other. Go to youtube and look up "ScannerDanner" he is probably one of the best on youtube for teaching automotive sensor diagnostics. And automotive diagnostics in general.
That will allow you use the Durametric to much greater potential.

Thanks again for the feedback.

I'll throw the old ones(Which are Bosch) back on and see what happens. If the codes stay I'll order one new one to move around and see if the codes go away. Don't want to spend the $ for all 4 in the hopes it makes the car run better. But, if this is a dumb idea, please let me know lol!

Screw it, just ordered 2 new Bosch units. Will report back.

[blue62]

Originally Posted by Radman

Thanks again for the feedback.

I'll throw the old ones(Which are Bosch) back on and see what happens. If the codes stay I'll order one new one to move around and see if the codes go away. Don't want to spend the $ for all 4 in the hopes it makes the car run better. But, if this is a dumb idea, please let me know lol!

Screw it, just ordered 2 new Bosch units. Will report back.

Your codes are showing that three of the four sensors are having issues.
I would replace all four with Bosch.
Then You have a solid foundation to work from.
An O2sensor and its wiring can be tested with a simple Digital Multi Meter.
Or the signal can be viewed with your Durametric.
If you switch the senor around looking to see if the code follows you have to move
two sensors then take the car for a drive sometimes multiple drives before the code shows up.
Senseless... when you can test them with a multi meter or Durametric in just a few minutes.

[Radman]

Originally Posted by blue62

Your codes are showing that three of the four sensors are having issues.
I would replace all four with Bosch.
Then You have a solid foundation to work from.
An O2sensor and its wiring can be tested with a simple Digital Multi Meter.
Or the signal can be viewed with your Durametric.
If you switch the senor around looking to see if the code follows you have to move
two sensors then take the car for a drive sometimes multiple drives before the code shows up.
Senseless... when you can test them with a multi meter or Durametric in just a few minutes.

You must like spending my money lol! All 4 arrive friday.

[blue62]

Originally Posted by Radman

You must like spending my money lol! All 4 arrive friday.

Not true
I don't like to waste money.
Trying to help you not waste yours.
Trying to point out better ways of diagnosing issues.

Buy quality parts that way you don't buy twice.
In a situation like yours three sensors are throwing codes and the other has 75 thousand miles on it. Buy all four and order once if you getting them on line. Or go to the parts store once to purchase them locally. Saves on shipping or gas which ever way your purchasing them.
It also gives you a solid foundation to start diagnostics of your O2senor codes from.

If you purchase something like a scanner be it a durametric or a foxwell or an oscilliscope like a Pico. Or even just a multi meter learn to use it to it's full potential.To do other wise is wasting money time, and effort in your diagnostic process.

If your into what makes things tick learn the best diagnostic procedure you can.
Then keep improving on that procedure the rest of your life.
Those are just a few of the things I try to do

[Radman]

Originally Posted by blue62

Not true
I don't like to waste money.
Trying to help you not waste yours.
Trying to point out better ways of diagnosing issues.

Buy quality parts that way you don't buy twice.
In a situation like yours three sensors are throwing codes and the other has 75 thousand miles on it. Buy all four and order once if you getting them on line. Or go to the parts store once to purchase them locally. Saves on shipping or gas which ever way your purchasing them.
It also gives you a solid foundation to start diagnostics of your O2senor codes from.

If you purchase something like a scanner be it a durametric or a foxwell or an oscilliscope like a Pico. Or even just a multi meter learn to use it to it's full potential.To do other wise is wasting money time, and effort in your diagnostic process.

If your into what makes things tick learn the best diagnostic procedure you can.
Then keep improving on that procedure the rest of your life.
Those are just a few of the things I try to do

I was kidding on wasting my money. Generally I'm a buy once cry once kind of guy.

I do have a durametric and a multimeter.

[blue62]

Originally Posted by Radman

I was kidding on wasting my money. Generally I'm a buy once cry once kind of guy.

I do have a durametric and a multimeter.

With the Durametric and your multi meter you can test any electrical component on the car.
Back probing or wire piercing are two methods used when using the multi meter.
Look into those two methods. You can buy back probes and wire piercers to use with your multi meter.
Check out scannerdanner on youtube he shows how to test and diagnose just about any electical issue on a car. He does some very good videos..He will up your diagnostic ability greatly.
Keep us posted on your O2 code issue.

[Radman]

Originally Posted by blue62

With the Durametric and your multi meter you can test any electrical component on the car.
Back probing or wire piercing are two methods used when using the multi meter.
Look into those two methods. You can buy back probes and wire piercers to use with your multi meter.
Check out scannerdanner on youtube he shows how to test and diagnose just about any electical issue on a car. He does some very good videos..He will up your diagnostic ability greatly.
Keep us posted on your O2 code issue.

I'll definitely look him up.

Thanks for the tips!