Hello, Early this morning in my 2012 panamera S model i left my driveway only made it down 2 blocks and the psm failure light came on with the auto start deactivated warning as well i turned car off it came back on . after a few hours of the car sitting i went back to drive home and it hasnt turned back on . so when i got home today and plugged in durametric i got this code under psm section (12656777/C12089) CHECK STEER.WHEEL ELECTRON. CONTROL UNIT FAULT MEM. CONTENT ? any thoughts on what can be wrong i also included picture of the error.

 

Have you found the issue? I have exactly the same:

I have a problem with Porsche Panamera 4s 970 from 2010 Year.

Sometimes after few meters sometimes after 5-10km shows on dash PSM failure, and SPORT AND SPORT ULTRA mode does not work.
After turning ignition off and on its ok.

Once it came even without moving a car but after turning the steering wheel. at this time i had dignostic and was looking on data from steering angle sensor but all data looked ok.

Also while driving i cheacked the information of car speed sensor in wheel but till failure came was ok and a second after failure came out it freezed and then ok one more time. But i think that abs sensors are not the problem and freezing cames after failure and not before.
with this failure cames also A/C problem but it does not metter if A/C is on or off. Failure cames all time.

Any one could know what can couse the problem?
Or have something similar?

Here are the faults that cames back always after failure exist

DME (digital engine electronics)
P1583 Sport mode not available

Transmission control
U0418 Check PSM control unit Trouble Codes content
U0456 Check A/C operator control unit - This fault can be ignored if active.

Porsche Stability Management
002085 Sport mode, centre differential lock, fault
00208A Sport mode fault
C12089 Steering ECU fault
C120A1 Centre differential lock control unit fault

Gateway
C12097 Check A/C unit Trouble Codes content

Steering wheel electronics
801103 Steering Angle Sensor (SAS) signal implausible

Rear end electronics
C12097 Check A/C unit Trouble Codes content

 

How's your batteries? I hear odd issues arise when voltage is not quite enough, throws errors all over the place.

 

I have same problem with him. Can I know how to fix this?
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Agreed, check battery, both at rest and while engine is running. Whenever I do work with battery disconnected I get PSM failure along with other errors.

 

Used to get a lot of AC codes scattered among different systems. A recall seemed to get rid of those pesky codes.

801103
V range 8 - 16 V

Possible causes:
SAS not connected properly
SAS not calibrated correctly
Not coded in PSM
SAS faulty

Driving for 25mi can clear fault if cause unknown.

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Were these errors there before you swapped out the air suspension for the coil spring setup? Hard to imagine you have all the exact same errors, maybe list them. (That reminds me I found an error canceller for Panamera RWD made by Ksport. Not sure if it would work for you)...

 

Hello have you solved the problem ? I have same problem serching for help. Thanks!





QUOTE=kubuswujo;4784831]Have you found the issue? I have exactly the same:

I have a problem with Porsche Panamera 4s 970 from 2010 Year.

Sometimes after few meters sometimes after 5-10km shows on dash PSM failure, and SPORT AND SPORT ULTRA mode does not work.
After turning ignition off and on its ok.

Once it came even without moving a car but after turning the steering wheel. at this time i had dignostic and was looking on data from steering angle sensor but all data looked ok.

Also while driving i cheacked the information of car speed sensor in wheel but till failure came was ok and a second after failure came out it freezed and then ok one more time. But i think that abs sensors are not the problem and freezing cames after failure and not before.
with this failure cames also A/C problem but it does not metter if A/C is on or off. Failure cames all time.

Any one could know what can couse the problem?
Or have something similar?

Here are the faults that cames back always after failure exist

DME (digital engine electronics)
P1583 Sport mode not available

Transmission control
U0418 Check PSM control unit Trouble Codes content
U0456 Check A/C operator control unit - This fault can be ignored if active.

Porsche Stability Management
002085 Sport mode, centre differential lock, fault
00208A Sport mode fault
C12089 Steering ECU fault
C120A1 Centre differential lock control unit fault

Gateway
C12097 Check A/C unit Trouble Codes content

Steering wheel electronics
801103 Steering Angle Sensor (SAS) signal implausible

Rear end electronics
C12097 Check A/C unit Trouble Codes content[/

 

Hello kubuswujo have you solved the problem? I have the same problem only in PSM module I'm geting one fault other foults is the same as yours please can you tell how you solved the problem? Other members maybe you know how to solve this problem. Battery tester shows that battery is in good condition. Please help any one.