Gate Select Position Circuit for Tiptronic

**pyrobecks** · 09-16-2008 07:52 AM

So I'm not sure what is going on. Yesterday on my way home from work my car started doing some weird things. The transmission decided to downshift on its own a couple times (this while at cruising speed on the freeway). Also tiptronic stopped working, I can't use the shifter or the paddles to shift in tiptronic mode. Also on the cluster the gear select display is different. Usually it is lit red letters for P, R, N, D, S... however that has changed to a lit background and non-lit letters (see pic)

I checked the DTC's and get the following:

Address 01: Engine

1 Fault Found:
005668 - MIL Request Signal Active (Check TCM for errors too!)
P1624 - 008 - Implausible Signal

-------------------------------------------------------------------------------
Address 02: Auto Trans

1 Fault Found:
002309 - Gate Select Position Circuit for Tiptronic (F189): Implausible Signal
P0905 - 000 - -

-------------------------------------------------------------------------------
Address 03: ABS Brakes

2 Faults Found:
01314 - Engine Control Module
000 - - - Intermittent

18055 - Check Coding of ECUs on Powertrain Data Bus
P1647 - 000 - - - Intermittent

After I cleared the DTC's the only one that comes back up is 002309 - Gate Select Position Circuit for Tiptronic (F189): Implausible Signal

Anyone deal with this before?I'm planning on taking it in to the dealer asap, just wanted to get some insight.

TIA

**Vito Roma** · 09-16-2008 01:04 PM

i've had the car downshift by itself before. various times in a 3 day span. from 5th to 3rd and 6th to 4th weird i know... usually when i was on the highway ect... has never happened since (knock on wood) but did not have any problems with the tip and/or lighted (p,r,d,s ect...)

**pyrobecks** · 09-16-2008 01:43 PM

Here's the pic of what the cluster looks like... usually the color of the lighted P,R,N,D,S is the other way around (Red Letters, Non-lit background)

**Vito Roma** · 09-16-2008 02:15 PM

u my friend went in "null mode" i beleave...take it to your dealer asap. Were u unable to go above a certain mph? are u chipped?

**bcramer** · 09-16-2008 03:05 PM

Since I know this question is coming anyways, I'll ask because I want to know, too. What exactly is "null" mode?

**pyrobecks** · 09-16-2008 04:11 PM

I think he meant limp mode... and I don't think I went into limp mode...

**akasch** · 09-16-2008 04:13 PM

what's limp mode?

**bcramer** · 09-16-2008 04:22 PM

Originally Posted by akasch

what's limp mode?

Limp mode is where the ECU won't let your car go past a certain RPM and boost is limited to almost no bars. It is to protect your car from damaging itself. I believe speed is regulated as well.

Originally Posted by pyrobecks

I think he meant limp mode... and I don't think I went into limp mode...

I definitely don't think he went into limp mode either...

**CX-7&A4** · 09-16-2008 04:32 PM

I have this too, try pushing the shifter over to the tip side, go - then + and push it back to drive. A switch or sensor is broken in the gear selector area. For me the black plastic broke off and it's been doing that ever since, disabling tiptronic mode until I do the above.

**AsianA408** · 04-20-2010 06:38 PM

is there a solution for this yet? i have the same problem on my 07 as of today.

**Der Konig** · 04-20-2010 06:49 PM

Originally Posted by CX-7&A4

I have this too, try pushing the shifter over to the tip side, go - then + and push it back to drive. A switch or sensor is broken in the gear selector area. For me the black plastic broke off and it's been doing that ever since, disabling tiptronic mode until I do the above.

Did you guys give that a try with any avail?

**AsianA408** · 04-20-2010 06:51 PM

didnt work man.... damn.. is this warrantee work?

**Der Konig** · 04-20-2010 06:57 PM

Yeah most likely, just take it to the nearest dealer and have them sort it out if your still under warranty

**AsianA408** · 04-20-2010 11:05 PM

really? no one has ever figured this out?

**womensecks** · 04-20-2010 11:44 PM

There are one of two things:

1. The magnet that tells the ECU what gear you are in has come loose and is throwing a fault (you need to take the tip assembly apart and reposition the magnet) or
2. The TCU has failed

**mc_hotmail** · 06-13-2020 08:10 PM

Turns out my P0905 code and PRNDS all lit problem was due to the last guy fiddle with my shift selector pop 1 of 2 magnets. In this picture, it is the round one at the bottom. It doesn't have a top barrier, so it can be snapped away by any iron objects. Be aware that the magnet must be put back in one direction. If you shift to D and gets the code again and PRNDS all lit, you need to open the whole thing and flip the magnet to its opposite side.

**kldrk** · 12-13-2020 06:13 PM

Originally Posted by mc_hotmail

Turns out my P0905 code and PRNDS all lit problem was due to the last guy fiddle with my shift selector pop 1 of 2 magnets. In this picture, it is the round one at the bottom. It doesn't have a top barrier, so it can be snapped away by any iron objects. Be aware that the magnet must be put back in one direction. If you shift to D and gets the code again and PRNDS all lit, you need to open the whole thing and flip the magnet to its opposite side.

I have an '06 A8L and after changing the cover because it broke in three pieces I got the code and the PRNDS. I did just as you indicated and discovered the barrel magnet was turned, after adjusting the magnet and clearing the code it's all good.