mark888

Hi,

I have a 958 Cayenne 2011 3.0 Diesel and lately the transmission is not kicking back gears when i put my foot down on the accelerator. It will just stay in the same gear and very slowly accelerate.

When slowing down the transmission works normally and downshifts correctly to a stop.

Also i have found the tiptronic manual shifting has stopped working on both the steering wheel and gear shifter.

I have had it on a scan tool but there are no fault codes present.

Any ideas?

deilenberger

Moving this to the 958 subforum where you're more likely to get a response..

pdxjim

If the performance is not good might be the EGR.

https://rennlist.com/forums/porsche-...limp-mode.html

mark888

Thanks for the info.

Unbelievably i was driving the car this morning and the exact same lights and symptoms happened as the link!! I believe this could of been the cause of the trans problems. I will check this out and see how i go.

mark888

Just an update for the repair.

Once put on the scan tool i had a number of codes for the DPF and one for the G235 exhaust temp sensor in the turbo.

The sensor tested out of spec so i replaced it.

To clear the DPF codes, i had to do a forced regen of the DPF with a scan tool.

So far everything is OK and the performance and kickdown issues with the transmission are working fine.