PASM Failure

[topmech0]

I have 2007 997.1 that has an intermittent PASM fault. 

Start car and drive sometimes few seconds ,sometimes an hour. PASM failure comes up and obviously goes into default mode. Plug in PIWIS and get fault varying from all four Shock absorbers (dampers) to sometimes both rears and sometimes Front Left. Faults are very inconsistent. have done the usual things of calibrate steering sensor,check coding of units etc,check connections. Feeling it is PASM control unit but customer says he had a unit plugged in and it was still the same. The actual values seem ok when driving with Piwis plugged and and watching them then one will drop out and as system goes to failure all current values read 0.00A

[Loren]

What is the exact fault code(s) please?

[topmech0]

only faults that I have seen are

000C FL SHOCK ABSORBER VALVE

000D FR SHOCK ABSORBER VALVE

000E RL SHOCK ABSOEBER VALVE

000F RR SHOCK ABSORBER VALVE

 

Sometimes all at same time, sometimes just FL and sometimes both rear. Its so variable and sporadic.

[Karl Owen]

I had that problem and dealer diagnosed a faulty PASM ECU, replaced it and it solved the fault.

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[FaizS]

Hi topmech0,

 

How you solve this faults? do you replaced PASM module like Koenbro did? I got one customer's car that same symptom like you.

[Jason Sjöbeck]

I have the exact same issue as described above and curious what solved it. (I know this is an older post but thought folks would allow my asking. Thank you.) 

Cheers.

 

[Guess]

On 6/23/2023 at 1:51 PM, Jason Sjöbeck said:

I have the exact same issue as described above and curious what solved it. (I know this is an older post but thought folks would allow my asking. Thank you.) 

Cheers.

 

Did you find a solution to your PASM issue?

[Josh Blades]

I'm having this same exact issue in my 07 997.1 Did you find a solution? Mine has been in bumpy mode for 2k miles and I can't take it anymore. It did this a couple times in the past but resolved itself. I took it in for a brake job 2k miles ago and the pasm failure light came on and has been on since. It resets after I restart the car but turns back on within a few feet of driving. Today I managed to make it half way around the block before it turned back on. If the car just sits still, I don't get the error. Leads me to believe there is a connection issue somewhere.