Uwon

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JFP, thank you for your quick and informative reply. Lots to take in. About the cat converter, what is their usual life span on these cars? Do you have a positive opinion on any of the various after market cats, such as Soul, Magna Flow, Fabspeed, etc.? I’m more interested in reliability as opposed to noisier exhaust. TIA Cheers Johan

I have a U.S. model 2006 C2S with 131,000 miles which has been running great despite my fault code woes that keep coming back intermittently or do not clear at all. Of particular concern are those related to the engine, but nevertheless I have included all fault codes here as some "may" affect others. I use a Durametric Pro unit. I can only clear the fault codes in #1, below. All the other fault codes cannot be cleared either individually or by choosing "clear all fault codes". (1) Bosch Digital Electronics Motronic 7.8.1 P0420, Catalyst system efficiency below threshhold bank 1 P2099, Post catalyst fuel trim system too rich Bank 2 P2097, Post catalyst fuel trim system to rich Bank 1. Initially I had just lean as opposed to rich conditions in bank 1. As a result I replaced all four O2 sensors and leaking throttle body. Smoke test done with no leaks indicated. I now get these three fault codes if I drive the car about 150 miles. Sort drives do not seem to trigger fault codes. I have rechecked all the electrical connections to the O22 sensors several times. I am wondering if this is not a catalyst converter issue. Thoughts please before I spend money. (2) Vehicle Electrical System Current Fault Codes 8039, Filler flap actuating element The local dealer told me that this is a common problem with the 997 and they don’t even bother to fix anymore unless the customer insists. In my case the spring solenoid/actuator can be pressed in and bounces back but not enough to catch the flap. I’m not worried about this fault and only mention it just in case it is somehow connected to any other issue mentioned in this post. (3) Airbag -POSIP Current fault codes C152, Communication PSM control unit (drive) I have no idea what this means. would appreciate explanation and advice. (4) Advanced Weight System-AWS Current Fault System 8014, POSIP LN no communication I checked the yellow contacts under the passenger seat and they are plugged in properly and are secure. Does this issue affect the airbags? Any thoughts would be appreciated. (5) Porsche Access System-PAS Current Fault Codes 8004, Terminal 50 What does the PAS really do and what is terminal 50? I do not get a chirp when I lock the car. (6) Front Body Module Current Fault Codes 8028, Left fog light 8029, right fog light 8042, Front luggage compartment unlocking The fog light issues are my own doing as I have done a hack for my after market fog lights that are used as DLR’s with the switch in the Home position and pulled out to the front fog light position. I have no idea about the front luggage compartment unlocking as the lid lock works as it should with both the key and the latch in the door sill. (7) Air Conditioning Current Fault Codes 8035, interior sensor fan A/C works fine. Where is the sensor fan located? Any and all help and suggestions would be most welcome. Thanks in advance. Cheers,

JFP, thanks again for your insight. I’m desperately trying to get an appointment with any one of several Porsche dealerships in the Toronto area for a PIWIS test analysis and will report back on my progress/resolution. These dealerships are all friggin busy this time of year. Cheers, Johan

Thanks JFP. By way of background, which may now be relevant, I was trying to resurrect the DSC controller for the PASM which was not working. I reprogrammed it with no avail, so I reinstalled the the Porsche unit and the Durametric still said that the car was not equipped with PASM. In addition, I have had for some time a red “Current Fault Codes” indicator for the Air Conditioning but without any codes appearing. I cannot clear the red indicator. The A/C has been working fine. May these two issues also be related to the KESSY/PAS and is it dangerous for the car or driver to continue to drive the car? Thanks in advance. Johan

Thanks Loren. First decent information I’ve had. Should have posted here first. Interesting that I can still lock the car properly but without any chirp. Also the fuel door does not lock which I had assumed to be a faulty actuator. Maybe it’s related to the KESSY/PASS. Thoughts? Johan

'06 C2S....Durametric indicates fault U0167 being the "Communication PAS Control Module". I cant find any reference anywhere as to its location. Anybody Know ??? Does it go by another name or acronym in Porsche lingo? Thanks in advance. Johan

The ignition key module on my 997.1 acted as you described. I think it is the same for your car. A quick DIY replacement corrected it, but then again, this particular problem is well known so you may have already done it. good luck Johan

So great to hear. The guys behind the scene are so often the unsung heroes. Cheers, Johan BTW, you will enjoy the C2S. I’ve had the same yr/model for 11 years.

Been following this thread with interest as I have a 997.1 S with ~120k miles that sometimes does the momentary chain rattle noise on cold startups common to the early air cooled cars. So, how does one diagnose the issue further? What would a Porsche shop likely do? listen with a stethoscope? Do you get a fault code eventually? Is it trail and error? First change the chain tensioner (cheaper alternative) and see if that eliminates the rattle? Johan

Go to Porsche.com North America, classic car parts and look up numbers on respective PETs.

You had a hydraulic not mechanical clutch. Does the ticking speed increase if you touch the accelerator lightly? Is it there at any time while driving? Johan

Can’t tell model or side from pic. Overflow drain for either WW, brake fluid, gasoline or battery. Take your pick. Johan

OK. You got me. What is an OBC stalk? TIA Johan