Hello!

Would like some assistance here before I go find an indy or dealership to diagnose/fix the car.

Error was only showing intermittently for the past 1-3 monts. However, this week, it has stayed on. Prior, the leveling/height control was working perfectly (even when the error disappeared).

Did some research online for possible causes (low battery voltage, damaged cables, etc). I didn’t see any damage around the strut/suspension (didn’t check behind panels/inside the car yet) and will be checking voltage later today.

I attached the error I am getting. Please help/advise on next steps.

Thanks in advance!


EDIT: wife drove the car this morning for about 50-60 miles. There has been no chassis system fault on the dash (from start up until now). The fault was there last night (unable to clear with Autel MK808s).

EDIT 2: chassis system fault came back on before my wife got home.

Checked the battery and date code was 10/19 (likely original/never replaced). Pulled the trigger and bought a new one. Install was a pain (because of the foam that hold the pump/towhook/flat sealer thing). Foam was blocking one side of the battery.

Before the install both DTC codes were present. After the install and battery registration, the passive fault remained. After clearing the passive fault, test drove the car for 10mins while checking for any faults/codes/DTCs along the way. NO FAULTS/CODES came back (before the new battery, I could not clear any of the codes). CHECK YOUR BATTERY FOR CHASSIS SYSTEM FAULTS (read this somewhere too).

 

Getting the chassis fault again. Still coming ON only after driving over 30miles. Goes away when the car’s been off for at least an hour.

Code reader still says passive/sporadic - Spring strut valve, rear left - short circuit.

Could the valve get stuck?

 

Hi,
I have exactly the same problem.
Did you find any solution ?

 

No solution yet. Hoping I get some suggestions here.

I couldn’t find any physical damage to the wires/lines/major parts. I’m thinking it could be the connector contacts. They may need cleaning or something.

 

Thank you for the fast reply.
Error code is exactly the same here. Also rear left. Also no physical visible damages.
I just noticed for me it depends on outside temperature.
Now in winter if the temperature is under 40F the error is not coming or is a very rare case.
If more than 40F and up to around 70F it's exactly the same as you described. After driving around 30miles the error message is coming.
If more than 70F the error message comes, faster. In summer when it is very hot outside, just after 1 mile driving.

When I park the car in the cool garage the error message disappears after 1h, but if i park at a hot place outside in summer, the error message does not disappear at all.

 

No problem!

That’s the exact situation I have!

I will try to clean the electrical connector for the airbag’s valve next weekend. Hopefully, that fixes the issue.

I am really out of ideas. But if it works, I will update this thread. Please feel free to update as well if you find a solution.

 

I may have found the solution.

I went to Porsche to get the airbag replaced (out of desperation thinking it was the sensors in the airbag). Unfortunately, this did not resolve the chassis fault.

A few weeks later, I was speaking to a guy who know Piwis. Surprisingly, he had a different type of chassis fault (leak). He was going through the process and he mentioned height calibration.

I looked at the repair summary from Porsche and did not see any height sensor calibration. So, this afternoon, I used my autel mk808s to do the calibration. Before starting, I confirmed I had all the same chassis faults (instrument cluster chassis fault came on too as I pull in the garage). After the calibration, I ran the codes and they were all gone. No faults on the cluster or the scanner.

I will monitor the car the next few days if it comes back.

Hopefully, this fixes your issue too!

 

Hi,
Sounds really good ! Thank you for sharing the information !

I would appreciate it if Porsche could take responsibility if they replace a part and it wasn't the solution...

I don't have an Autel mk808s, but i will try to do same with my diagnostic tool. I am not sure if it support height calibration but i will check later.
Please let me know if the error coming back after some longer drives.
If my tool is not working and it was really finally the solution i will get that mk808s tool.

 

Unfortunately, the chassis fault came back on. I am thinking this is a wiring or sensor issue somewhere between the module and strut sensor.

 

It's possible that is a height sensor problem. Try to use sport+ mode to see if you have the same problem.

 

tried sport+ multiple times but unfortunately, chassis fault still came back.

 

After checking all connections, changing the valve block, and recalibrating, the chassis fault (rear left strut short circuit to b+) still came back. Worse in the heat and recently even in the cold weather, fault was still coming back.

HOWEVER, a few months ago I bought a used PASM from Ebay ~$150 (same model just different last two characters AN -> AJ). When I first installed this, I was getting multiple errors so I thought it was not compatible.

I tried again this afternoon. I read somewhere (nhtsa doc I think???) that the ignition needs to be turned on and off, clear codes, and perform a height calibration. Used the autel MK808s.

I did. No error codes came back. No chassis fault. Car felt better. All modes working. Drove it in hot weather. No issues. I’ll keep driving it the next few days and see if this is the solution. Will update here again.

 

Confirmed fixed!

after +100miles, chassis fault never came back. No errors on the PASM module. Car runs great again!