PSM & ABS warning lights

andyc14 · Jun 12, 2019

hi, bought my first Porsche a few weeks ago, always wanted one so decided on a 2002 Boxster S as my tentative dip into Porsche. I love it already!

however, I was driving the other day and the car beeped and put up 2 fault codes, PSM & ABS. It stayed on until restart when it appeared to have cleared. Since then every time I drive the car it comes on after 2 to 4 miles.

a bit of background, the previous owner had only covered about 300-500 miles in total over the last 3 years (don’t know whether this may have any effect).

has anyone had any experience with this type of fault and possible causes?

thanks in advance!

Andy

Motorhead · Jun 12, 2019

Andy,

Low battery voltage can throw up different warnings. If the car's had little use and hasn't been on a battery conditioner it's possble that the battery is on its way out, so best to get it checked-out before looking elsewhere.

Jeff

andyc14 · Jun 12, 2019

Thanks Jeff

my understanding from the previous owner is that the battery was replaced just over 2 months ago.

thanks for your help anyway.

Andy

malarcy · Jun 12, 2019

I would echo the battery thing - even a new battery can have low charge - and boxsters are very sensitive to it - if you have the chance get a charger on it - and if it changes nothing after that - then you have to dig deeper. Ideally a scan with a porsche "aware" scanner (generic scanners won't have a clue about psm/abs), but as a general guess, one may well follow the other - psm is likely sulking because of the ABS fault - and that could be as simple as a brake light switch or a wheel sensor or could be a number of other things. Suggest get it into an independant specialist who can read the codes - or look out on here, or on boxa.net for enthusiasts local to you with the kit who will "scan for beer"