Hi,
I have a 2002 996 turbo with Miltek exhaust and EPL Tune and am again being plagued by ABS / PSM failure.

I first got the messages about six months ago, at that time it came up under braking so I changed the brake perdal switch and all was good for several months.

Now it is coming up on most trips. 99% of the time the message will be displayed the very second that the car is started, If I dont acknowledge the alarm it will allways just simply disapear as soon as I reach exactly 10 mph.
If my driving is slow across town the messages will come up again within 5-10 mins of setting off at no particular time and not under braking. If however I am up to motorway speeds within 5 mins of setting off the message will not re-appear.

I am showing NO CODES using Durametric. I also have a new spare MAF which when fitted does not make any difference.

I have done a fair bit of reading and have gleaned the following possible faults from other threads:-
MAF - Brake pedal switch - ABS sensor - Wheel speed sensor - Air leak after MAF - o2 sensor - Steering angle sensor - bad alternator.

My question is has anyone experienced the ABS / PSM failure lights in the same way that I am currently doing so, if so what was the outcome?

Secondly whilst taking into account the times that I am am experiencing this issue and the time when I am not, where would you think would be the best place to start to look.

Any advice greatly recieved. Thanks Shaun.

 

I have not had ABS/PSM the way you describe but have seen it with boost leaks. Next I would pressure test the system, if I were you.

 

get the codes pulled.

Also, dont rule out the battery. I have had old batteries do this in a few cars.

Running stock wheels/tire sizes?

 

Thanks for the replies guys.

I fitted a new battery about 3 months ago, didnt buy the Porsche one which was what was originally on it but the BOSHH direct replacement.

The wheels are original but the tyres are 315/30/18 rear and 235/40/18 front. I bought the rears cheap after reading threads on here but had to change the fronts to match. I dont think this is the issue as it ran for a couple of months or so without fault.

I think it maybe needs to go back to OPC to see if they can read any codes that durametric cannot, but it will be a few weeks until i can get to them.
In the meantime my friend is pulling together all the bits and pieces required to do a leak test. This may not be the issue but its something worth doing anyway and all I can do till it goes to the dealer.

 

Update:-
A lucky turn of events today.
My wife's boxster is now sold, the lucky part was that an OPC technician came to check the car out wih the buyer and brought the Porsche diagnostic equipment with him.

He plugged it into my car andImmediately he diagnosed that the issue was with the front passenger speed sensor.
He advised me to check the wiring continuity first, but in most cases it's just a faulty sensor.
I'm not sure why durametric doesn't pick this up though.

Thanks everyone for your help, just goes to show that there's no substitute for a proper diagnostic.

 

I have to ask this............is the item you call Durametric actually a "Durametric" http://www.durametric.com/default.aspx or something else like a hand held unit.

A real Durametric can, will, and does show this code and fault. Also it will allow you to measure the wheel speed etc etc.

Please for the sake of all that might read this later what's the exact test unit you used called ( not the one the technician used). Most OBD2 readers are useless for anything but OBD2 faults.
Thanks,
Frank

 

I was asked this on another forum that I posted this on.
It is most defiantly an all singing and dancing Durametric. A friend of mine who has the same car lets me use his.
It is the enthusiast version which means it wil only operate on 3 seperate vehicles but has all functionality of the non enthusiast version.
It's disappointing that it did not pick this code up but I have no idea why.

 

Very Strange . It should be able too. Durametric is one the best things out, apart from PST2/PWIS or Auto logic. it most certainly should have detected that fault and given you a code. I'm presuming your mates is a version 5 and not the latest version of Beta 6 ( 6.1.0.1)?? Even so IIRC version 5 should still be capable.
Frank

 

Your right Frank it is a version 5, my mate tells me it has the ability to data log measurements taken from these sensors, so it should have picked up the code.

A chap on the other forum also commented that his durametric picked up this code when he had a similar issue, In the end it turned out to be the wiring that goes to the sensor that was the issue in his case.

 

That was me on Piston Heads

 

Lol, the Internet makes The world so much smaller!

 

Hi all

I thought I might chime in for clarity purposes.

I am the friend of ukgatecrasher with the Durametric. I read the cars fault logs with my laptop with the very latest v6 of the software (which is so much better than previous versions, especially the sampling rate of datalogging).

I am sure I checked all of the modules on his car, but I might just have checked engine codes and not all of the modules.

I will check again before he fixes the fault and feed back my findings.

 

Just to close this out incase anyone is reading and has similar issues.

It turns out that durametric does indeed pick up this code, it seems that we did not check the abs module initially. The code it picked up was front left speed sensor implausible.

Research shows most likely causes are speed sensor faulty or cabling faulty.

Had both tested locally but as it was an intermittent issue no faults were found in the sensor or wiring.

As getting to a dealer is a bit of a pain I ordered a speed sensor to change myself.
Cost was £60 and only a five minute job, but the holding bolt was corroded and the sensor itself was stuck tight in it's hole. My local garage changed this out for me at a minimal cost.

Two days later the lights came up again. So I ordered the abs wiring harness repair kit from Porsche (£60) and my garage changed this out for me (requires splicing in).

So now all is good :-)

 

Good news Shaun

Glad you're sorted........finally

 

Happy days Kenco.
Can finally get used to enjoying the car again :-)
Will bring durametric to work with me this weekend.