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drucejnr
27-05-2016, 10:18 AM
Just to clarify, i drive an 8L S3 so maybe you mk4 gurus could shed some light on my issue...

the other night I was driving the car home and about halfway into the trip the traction control light decided to turn on; I did not manually press the ESP button at all. Now every time I drive the car, the TC light comes on as soon as I start the car without me pressing the ESP button.

I changed the MAF sensor with a brand new one (as thats what other forums have said to do) and that did not fix my problem. I don't have direct access to a VCDS but could it be that my haldex has finally let go?

I plan on getting it scanned asap but yeah, just trying to figure out possibilities.

Cheers
JustCruisn
27-05-2016, 10:29 AM
Maf has nothing to with the esp.

Maybe you have a bad wheel speed/ABS sensor, or the sensor disc has gunked up.
I had a loose speed sensor once and it made abs kick in all the time, no traction control on that car however.
drucejnr
27-05-2016, 11:08 AM
true true, I'll give them a clean and see if that changes anything.
ABS light isn't on so I think it could do with a scan.
aprr32
27-05-2016, 12:13 PM
Had many an S3 with a bad maf and esp light on at same time,new maf and no esp light.Strange but true.
h100vw
27-05-2016, 01:56 PM
Best find someone with VCDS next and see what the cars says is wrong. ESP and TCS won't work if the ECU can't see what is happening with the engine, ie what the airflow through it is.

Other failures can cause the same lights to come on though, ABS failures, no wheel speed at one corner or the YAW sensor.

Gavin
drucejnr
27-05-2016, 05:44 PM
Cheers Gavin. Yeah a scan is what I'm going to get done - no more guess work and it'll give a straight answer. Thanks for the input fellas


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dylan8
27-05-2016, 06:55 PM
wheel bolts tight? ;)
drucejnr
27-05-2016, 10:07 PM
wheel bolts tight? ;)

hahahah, that was the first thing I checked lmao
dylan8
29-05-2016, 08:10 AM
Which car fid you do the brake upgrade on?
drucejnr
29-05-2016, 07:43 PM
Put the 4pots on the S3; R32 gets no love
drucejnr
30-05-2016, 01:51 PM
ok, so I managed to get the car scanned over the weekend and I was greeted by the lovely "no fault codes found"...

im stumped lol. I had my CV's replaced just the other week, before the TC light came on, so my guess is either a wheel speed sensor or something ABS related.
h100vw
30-05-2016, 03:47 PM
ok, so I managed to get the car scanned over the weekend and I was greeted by the lovely "no fault codes found"...

im stumped lol. I had my CV's replaced just the other week, before the TC light came on, so my guess is either a wheel speed sensor or something ABS related.

If there's a light on, there must be a fault. Did you scan all the controller, or just the engine ECU?
drucejnr
30-05-2016, 05:26 PM
Thats why I'm stumped, because I know there has to be something wrong...

Tbh, I'm pretty sure it was just the ECU that was scanned
Euro Remaps
30-05-2016, 06:27 PM
what system was used to scan it ?
drucejnr
31-05-2016, 06:44 AM
a legit rosstech cable
drucejnr
14-06-2016, 06:51 AM
So last night, took the car for a bit of a brap and about 40mins in, the TC light decided to turn itself off... weird lol.

Anyway, I've still got no idea what the issue was but its gone for now. If it pops up again Ill suss it out further