Beater Boxster ODB2 readout.. Ugh!!

[Cebu]

I found a Durametric cable on Craigslist and snagged it up. After fumbling around getting their software to work with my Macbook Air I was able to perform a diagnostics.

I have a bunch of failures fitting for my Beater Boxster. I now see why my alarm always "double beeps" when turning it off. (check out the readout below)

My first plan of attack are the errors P1137 and P0430. I believe the P0430 is the reason my CEL comes once in awhile.

Durametric Readout:
"Porsche fault code 45 - Cat conversion bank 2 exceeds limit value"

Bentley Service Manual:
“TWC conversion cylinders 4-6” [Short to ground / below lower limit / lean mixture threshold]

I’ve searched around the internet trying to decipher what this means and there seems to be a variety of fixes such as a bad 02 sensor, air filter, MAF or catalytic converter. I’d like approach this with your experience in troubleshooting. I have the durametric cable/software, multimeter, oscilloscope and tools, just need some guidance.

Thank you in advance!


Here’s Beater Boxster Printout:

Work Log
****
Short Test
Bosch Digital Motor Electronics Motronic 7.2

Current Fault Codes

P1137:
Porsche fault code 446 - Clutch switch Signal implausible

P0430:
Porsche fault code 45 - Cat conversion bank 2 exceeds limit value

ABS/PSM 5.7
No Faults Found
****
Instrument Cluster K21
No Faults Found
****
Airbag B05

Automatic Air Conditioning H01
No Faults Found
****
Alarm I32

Current Fault Codes

47:
Control locking synchronization
Status: present
Occurance Counter: 32

60:
Central locking limit position Lock not reached
Status: not present
Occurance Counter: 3
This fault is displayed for informational purposes, it is not an indication of a
problem and no repair is needed.

61:
Central locking limit position Unlock not reached
Status: present
Occurance Counter: 57
****
Litronic headlights HBA

Park Assist

Seat Memory

[NewArt]

Clear the codes and see what comes back after a day or so.
When the car is warmed up, using the Durametric, go to actual values and click on O2 sensor voltage before and after cat 2. I f you get a more ore less flat line and a wavy line, the cat is good. If both lines are wavy, the cat may be bad. I picked up a used cat from European Parts Depot on eBay for $120. It came with two O2 sensors. The problem is now gone and as a bonus, it also cleared up the SAI code I was getting! I don't know why this is but I'm not complaining!

[Cebu]

I'm going to try this tomorrow morning. I did a reset prior and the CEL went away. It came back on I'm guessing after 150 miles of driving. Same error. Thank you for your feedback it's much appreciated!

Originally Posted by NewArt

Clear the codes and see what comes back after a day or so.
When the car is warmed up, using the Durametric, go to actual values and click on O2 sensor voltage before and after cat 2. I f you get a more ore less flat line and a wavy line, the cat is good. If both lines are wavy, the cat may be bad. I picked up a used cat from European Parts Depot on eBay for $120. It came with two O2 sensors. The problem is now gone and as a bonus, it also cleared up the SAI code I was getting! I don't know why this is but I'm not complaining!

[justin-in-athens]

I have a set of spare cats with 02 sensors off my '99 2.5l

If you need them PM me.

Justin

[Cebu]

Good evening Justin, I PM'd you..

Originally Posted by justin-in-athens

I have a set of spare cats with 02 sensors off my '99 2.5l

If you need them PM me.

Justin