7.2 GT3 "TC failure" light on

[SFO]

my car developed "Traction Control failure" last week.

The warning comes on only when there is steering lock, and warning goes off when going straight ahead.

my Porsche tech changed the steering wheel sensor - turned out to be a Cayenne part, and relatively cheap at £75 - last night to no avail.

the steering wheel sensor was successfully calibrated a few times last night, but after a few movements and a short drive, the "traction control failure" light comes on and off as before.

PIWIs doesn't say what the issue is, just that there is a problem with initialising the steering wheel angle sensor. The fault code is 4444.

We are now going to change the steering wheel module .. which apart from the PSM module, can be the only thing causing the problem. Apparently, PSM module hardly ever goes wrong. My tech has never changed one, having been a Porsche tech since 997s were introduced.

Thoughts, suggestions and similar experiences most welcome.

Thanks.

[Dr S]

My 7.2 3 does this once in a while too. It just needs a restart to work properly again.

[Digga]

My 996tt out up ABS & PSM faliure warnings a couple of times, just after exiting the Karussel in the wet. Again, as with DR S's experience, it went away after the ignition was reset. Never found out why and it never happened before or since. Was this in heavy rain OP?

I wonder if sensors are susceptible to errors in heavy rain?

[SFO]

not in rain

reset of all kinds tried but no luck: via PIWIs, disconnecting battery, re start engine

[Digga]

SFO said:

not in rain

reset of all kinds tried but no luck: via PIWIs, disconnecting battery, re start engine

Hmmm, bother.

Not anything like the same issue then. Have you tried posting something in the 911uk forum?

[SFO]

Digga said:

Have you tried posting something in the 911uk forum?

will do that, thanks.

[Digga]

SFO said:

Digga said:

Have you tried posting something in the 911uk forum?

will do that, thanks.

That and maybe Googling with "Rennlist" in front of the issue might throw up more info. Just done similar researching another topic myself.

[SFO]

Digga said:

SFO said:

Digga said:

Have you tried posting something in the 911uk forum?

will do that, thanks.

That and maybe Googling with "Rennlist" in front of the issue might throw up more info. Just done similar researching another topic myself.

started a thread on rennlist

the module is £280 so not terrible.

am going to take car out for proper long run this weekend to see if that sorts it out

[SFO]

steering wheel module changed yesterday, all working fine now.