Weird suspension behavior

[vchris]

Hello,

CTT 2008 120k miles with PDCC

PDCC fluid changed 3000 miles ago, along with a line that broke while driving.

The past 2 weeks, the chassis red warning appears almost 3-4 minutes after starting the car. It is not a daily driver so it sits for 2-3 days between drives.

To the problem, the red warning appears but the air-suspensions works flawlessly, I can select any level and the car reaches it immediately.

However, chassis control modes are disabled including sport mode. Once I switch off the engine and restart the problem appears after 2 minutes. Once I drive for 2-3 miles I switch off again-restart and the problem goes away.

Anyone knows what it might be, I don't have durametric and between work I don't have time to visit my Indy!

Thank in advance,

Chris

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[JFP in PA]

The PDCC system may be low or have an air pocket in it.  You need to get the vehicle scanned to really know what is going on.

[lewisweller]

4 hours ago, vchris said:

 

Hello,

CTT 2008 120k miles with PDCC

PDCC fluid changed 3000 miles ago, along with a line that broke while driving.

The past 2 weeks, the chassis red warning appears almost 3-4 minutes after starting the car. It is not a daily driver so it sits for 2-3 days between drives.

To the problem, the red warning appears but the air-suspensions works flawlessly, I can select any level and the car reaches it immediately.

However, chassis control modes are disabled including sport mode. Once I switch off the engine and restart the problem appears after 2 minutes. Once I drive for 2-3 miles I switch off again-restart and the problem goes away.

Anyone knows what it might be, I don't have durametric and between work I don't have time to visit my Indy!

Thank in advance,

Chris

Sent from my iPhone using Tapatalk

 

Chris the pdcc system has three main issues. 

 

Leaks and more leaks, this would be my first thing to check all the lines, the distribution blocks and connections to sway bar for any fluid leaks. Rubbing and chaffing is common some parts are superseded to prevent this. 

 

Secondly the reservoir is a service item having a integrated filter, could it be blocked? 

 

Electrical connectors water ingress and or corrosion. The faulty pump causing low pressure, or pressure switch faulty causing high pressure. 

 

As JFP said need the fault codes, if red warning for sure there is a code. 

[vchris]

The car has been plugged on Durametric but no fault is stored, and the Porsche technician at the dealer said it might be the Gemballa lowering module that acts like that or the battery which I haven't changed it for almost 3 years.
What is the correct voltage of the battery when new?


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[JFP in PA]

Fully charged, the battery should give you around 12.6-12.8V DC (open circuit, no load, engine off).  With the engine at idle, you should see 13.5V-14.5V DC.

 

The ideal method to test batteries is to run a load test, but that requires a piece of equipment to accomplish.  Here, many auto parts stores will do them for free in hopes of selling you a replacement.