trouble with traction control light

[paul vp uk]

Fed up with intermitent orange traction control light light coming on in odd situations.
if i do over 70 for ten minutes or it rains then on comes the light.
normal driving no light ,
for the mot in may she had new rear pads.
its allmost if they heat up or get wet. (on comes the light)..
Apart from this little niggle my new to me vito 04 dualiner feels good !!
would half warn rear tyres cause the odd light on?

 

[MB TECH WARRINGTON]

if you are not losing traction, i'd suspect a faulty wheel speed sensor(abs sensor)

 

[Stomper]

Having a similar problem of traction control kicking in when it shouldn't and leaving me with no power. As a first point of attack I thought I'd clean the wheel speed sensors. Any idea if/how these sensors can be tested and how do you remove them from the hub. I took the 10mm bolt out of the first one but the sensor is in solid and I don't want to break it by prying if for instance you need to turn or slide them. Thanks Dave.