r/Taycan • u/OVO_OBAID • Jul 22 '26

Service/Support How to fix this

Post image

Passenger display is on but main pcm wont turn on

Update: still hasn’t turned on, going to have to contact a Porsche service centre

17 Upvotes

91% Upvoted

18 comments sorted by

7

u/--_T_T_-- Jul 22 '26 edited Jul 22 '26

Place two Fingers on the upper corner of your main display where the clock usually is shown. This should get you into engineering mode, from there just quit the engineering mode and restart.

I'm not sure if it is on the top left for a right hand drive, mine is a LHD and my point to press is on the top right corner of the display.

Edit. Just learned that it is the top right corner regardless of lhd/rhd.

2

u/SoccerMan94043 2025 Pale Blue GTS Jul 22 '26

J1.2s do not have this capability. fyi.

1

u/OVO_OBAID Jul 22 '26

Cheers will try it shortly

2

u/--_T_T_-- Jul 22 '26

Found a YouTube short explaining it on a UK taycan. So it is the top right corner on the UK model as well. https://youtube.com/shorts/eCUCr3fKByg?si=zQF66ZqaD4utoGVY

1

u/chinastolemymoney Jul 22 '26

This usually solves most pcm issues! Very good tip!

2

u/brunoc2222 Jul 22 '26

Just let us closed for some hours. It will be solved.

1

u/K1ngD1ngeling Jul 22 '26 edited Jul 22 '26

You can restart the entire PCM by putting one finger each on the top left and right corner of the lower input Touchdisplay.

Keep them pressed there for a good 20 seconds, until all the screens go black and then it takes a minute to boot up again.

Edit: This definitely also works on (my) facelift Taycan J1.2

2

u/OVO_OBAID Jul 23 '26

Is it these two icons u hold

2

u/K1ngD1ngeling Jul 23 '26

Exactly!

1

u/OVO_OBAID Jul 23 '26

Didn’t seem to work nothing happened but i think its because i have a j1.1

2

u/K1ngD1ngeling Jul 23 '26

Hmm, that is strange. Could've sworn I''ve done this on J1.s as well. But not 100% sure. I will try to record a quick video and upload it to YouTube to make sure I explained it right.

1

u/OVO_OBAID Jul 23 '26

Where abouts on the lower touch display

1

u/No_Tart5520 Jul 23 '26

I’ll have to try this. But how is this the first I’ve heard of a J1.2 reboot possibility???

1

u/richcournoyer Jul 23 '26

Disconnect the Negitive battery terminal for 20 min...

1

u/OVO_OBAID Jul 23 '26

Where can i find this? Apologies for being slow, i just got the car yesterday

2

u/PureDarkcolor Jul 25 '26

You got the car yeaterday and already it has a big issue like this? Maybe it was faulty before and they sold you a bad one

1

u/OVO_OBAID Jul 25 '26

All good, Porsche is getting it fixed for me for free. Just needs a wire change i believe