I just replaced the battery last week and the brake switch yesterday and the "PSM Failure" light came on again today? What next?

 

Make sure you use a Porsche brand brake light switch. My Indy replaced mine with a non OEM brand and it came on again (and charged me over 300$) needless to say, no longer my Indy. New Indy replaced with the Porsche part and all good for 150$.

 

I did replace with OEM brake switch.

 

Anyone?

 

Get another one from the Porshe dealer, maybe its defective. Less than 30$.

 

Did you scan? Is it the brake light switch or is there another failure ?

 

I’m still intermittently getting the message. Idk?
Guess I’ll have to take it in.

 

By chance is your brake pedal sticking at all, i.e. not coming all the way back up by say 1/4-1/2 inch? Where did you get the switch from? Did you put in a second one? Did you scan or not?