Sportback Traction control

RS03_SEN

Registered User
Had a problem with the traction control pretty much since day 1.
Even in the dry at say 15-20mph I can put my foot down and the traction control light will come on and the car won’t accelerate much.
I took it to Audi to look at and they said they tyre pressures were low, which they sorted.
Problem was still there. It’s not all the time but it’s often enough.
If I accelerate, let off, then back on again, it seems to do it more often.
Took it to Audi again last week and they drove it, said they got no light on the dash. Plugged the car in and it showed that the car was mapped and they told me to have it returned to standard before they can diagnose properly.
I asked them to change the haldex oil which they did and they also told me they changed the filter.
The problem is still there.


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Marshy

Settled in
What make of tyre are you running?
People with facelift cars mention similar issues when running Michelin PS4s
 

Jonessy95

Registered User
Had a problem with the traction control pretty much since day 1.
Even in the dry at say 15-20mph I can put my foot down and the traction control light will come on and the car won’t accelerate much.
I took it to Audi to look at and they said they tyre pressures were low, which they sorted.
Problem was still there. It’s not all the time but it’s often enough.
If I accelerate, let off, then back on again, it seems to do it more often.
Took it to Audi again last week and they drove it, said they got no light on the dash. Plugged the car in and it showed that the car was mapped and they told me to have it returned to standard before they can diagnose properly.
I asked them to change the haldex oil which they did and they also told me they changed the filter.
The problem is still there.


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What tyre size and brand you got on them?


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RS03_SEN

Registered User
Had Pirelli pzero when I bought it then recently changed to Michelin super sports. Happened with both sets.
I could understand if the roads were wet and I was doing some speed or accelerating hard but it does it when it’s dry and I’m not driving hard.


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Jonessy95

Registered User
255/30/19 front 235/35/19 rear. I just got same size as was already on it.


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You need a square set up , mine did that with the 255’s on the front traction used to flicker and loose acceleration, changed to 235/35/19 all around and never had the problem since much better


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RS03_SEN

Registered User
You need a square set up , mine did that with the 255’s on the front traction used to flicker and loose acceleration, changed to 235/35/19 all around and never had the problem since much better


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Makes sense now you mention it. If traction control gets confused when tyre pressure is low, surely different profile tyres will cause a similar issue?


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Jonessy95

Registered User
Makes sense now you mention it. If traction control gets confused when tyre pressure is low, surely different profile tyres will cause a similar issue?


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Quattro is very sensitive to difference size tyres , change to 235 problem be gone straight away


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RS03_SEN

Registered User
Quattro is very sensitive to difference size tyres , change to 235 problem be gone straight away


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Should have joined the forum a couple of weeks back, only just put brand new tyres in all round. Thanks a lot for that. Really appreciate it. Been doing my head in since October and always worrying when it happens when overtaking!


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Jonessy95

Registered User
Should have joined the forum a couple of weeks back, only just put brand new tyres in all round. Thanks a lot for that. Really appreciate it. Been doing my head in since October and always worrying when it happens when overtaking!


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Yeah it’s definitely not the remap or haldex , definitely the tyres since I had this problem


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kaspar

Registered User
I have the same problem.

Have you tried turning tc off? So it’s in sports mode
 

AudiNutta

Moderator
Staff member
Moderator
Gold Supporter
Should have joined the forum a couple of weeks back, only just put brand new tyres in all round. Thanks a lot for that. Really appreciate it. Been doing my head in since October and always worrying when it happens when overtaking!


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From skim reading, it’s suggested that the 255/30/19 and 235/35/19 tyres are wrong? No that’s the staggered factory setup as intended.

Oversensitive traction control is well known on these cars, touch the TC button once and put it into sport and no more issues.
 

Powerenhancer

Registered User
It is not tyres nor is it the staggered setup even though some tyres can make the issue slightly worse. However, the root cause is not tyres.

I have had this issue from new on staggered PZeros, square 235 and square 255 PSS4S.

From another thread I commented on:

"I am 99.9% convinced the issue lies in a combination of over sensitive TC software and slack in the 4WD system, commonly found with Haldex systems. Once all 4 tyres hook up there isn't an issue but the TC software see's "slip" during the time it takes the system the engage all 4 wheels fully. For me this is evident with the TC off. Hard acceleration starts with a very brief but discernible amount of slip followed by huge grip.

Audi torsen AWD systems have less slip/hook up time so those cars fair better with sensitive TC software."
 

RS03_SEN

Registered User
It is not tyres nor is it the staggered setup even though some tyres can make the issue slightly worse. However, the root cause is not tyres.

I have had this issue from new on staggered PZeros, square 235 and square 255 PSS4S.

From another thread I commented on:

"I am 99.9% convinced the issue lies in a combination of over sensitive TC software and slack in the 4WD system, commonly found with Haldex systems. Once all 4 tyres hook up there isn't an issue but the TC software see's "slip" during the time it takes the system the engage all 4 wheels fully. For me this is evident with the TC off. Hard acceleration starts with a very brief but discernible amount of slip followed by huge grip.

Audi torsen AWD systems have less slip/hook up time so those cars fair better with sensitive TC software."

I’m 99% certain my car does it with TC off also but I will check when the roads are dry again.


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ivelger

Registered User
Hi,
I have the same problem. Called the dealer who approached Audi and apperantly there is an update to the ABS module. Haven't had the chance to update yet so i do not if it solves the problem.



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kaspar

Registered User
Hi,
I have the same problem. Called the dealer who approached Audi and apperantly there is an update to the ABS module. Haven't had the chance to update yet so i do not if it solves the problem.



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When was this update released?
 
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