Hi guys, as an update. I did get the 'recharged' battery back in the car. I cleared codes and the car started up. It ran for about 5 minutes without anything happening and I shut it off.

Next day I go out to start and the codes were back and car wouldn't start.

So something is happening while the car is completely off to throw these codes? I pulled the seat up and checked connection to the DME (ECU, not sure the best term there). Is there any thing I could damage by unplugging it and plugging it back in?

I just don't understand how something could occur with the car completely off. When the car is running it will run for about the same amount of time each time and then I get 'PSM Failure' and 'Failure indicator' and car shuts off and won't restart.

 

Hi Jim, I do think you are correct. He said it failed the 'low cycle' (I think) and said he would have it ready to go the next day. It seems to be doing its job now.

 

I read this post and it's a little scary. Is there any way to check the PSM system? I'm going to trace wires today and see what I can find. I did install my own lowering springs and did brake pads about 6 months ago. But have had no PSM lights or issues.

http://www.renntech.org/forums/topic...abspsm-module/

 

UPDATE: I unplugged the ECU, and the PSM module. Checked all ABS lines and PSM wires in the wheel wells. As of right now the car is running fine and driving.

For some reason I can't get the engine bay light to go off even when the car is turned off. But that's my only issue right now.

 

There was a thread on 6speed about a broken switch on the front latch. Both switch, luggage and engine compartment, operate both lights at the same time...

 

Reads like an alternator problem. The alternator is not able to generate enough power to meet the car's electrical needs. The battery does what it can, supplies what power it can, but when it gets low all sorts of things happen then the engine dies.

Leave the car sit a while and the battery could recover and you can get the same symptoms.

(A couple of weeks ago, during a visit to a Porsche dealer a Porsche tech had a Cayenne in the service bay doing the same thing and that was his diagnosis.)

Unless there is evidence of moisture in the car, under the seat leave the security module alone. The behavior does not point to that component and if you unplug it and plug it back in you risk static discharge or screwing up a connector.

 

Sorry to see you are having problems, I know your pain! I saw that you posted in the southeast section to see if any people are down in your area and I am down in Columbus as well. Hit me up if you want to meet up sometime.

 

for my understanding a canbus communication problem....if one adress fails the bus is interrupted..

failures possible...cables at instrument k21
failures at bus cables abs
failures at bus cables psm

failure at dme

failure a secure module...connectors?

not easy to find...you can check your k21 instrument...connectors out and contact spray...dme connectors same and abs connectors same..(all without battery)

check cables along this route...good luck to find it ...

 

Very cool, I didn't know there were any enthusiasts around. I sent you a PM.


As of right now I think the car is back in operation. I unplugged ECU and PSM module and plugged back in and the car runs and drives alright. I'm a little gunshy driving far from home at this point. Just hoping I'm good from now on.

 

I know this fix was too easy. The problem is back. Drove the car for a short errand and got a mile down the road and it shut down. Seems like it was triggered by just going over some bumps or rough road.

Just had it towed back.

I can get the car to reset by unplugging the PSM module. So probably a dumb question but are there any PSM wires in the rear of the car or just the front?

 

Well, sent the car off to APR today. Hopefully they can figure out what the problem is. Fingers crossed.

 

HIX, do you have an apr flash?

 

No, they are just the closest shop to me. The closest Porsche dealer is Jack Ingram in Montgomery and I just figured I would try APR. I have an EPL flash.

 

Hi mate, sorry for bumping an old thread, I have the same symptom and codes,.but the car is running, may I ask whats the find out and.fix finally? Thanks

 

Hi Guys, 1st post here and sorry to resurrect this old thread, but I too have this same problem. The car just died on me yesterday and has the same codes as Hix mentions. Additionally there is an image of an outline of an engine block in orange and the words 'failure Indicator' showing in the window under the rev display. The car won't even turn over. I got the above faults from Durametrics scan.

I can't pm at the moment, does anyone know what the solution was for Hix ? Or hopefully he will see this

Thanks