Melnic

My Octavia's sudden braking and veering to the right issue is still present. My mechanic does not believe it is the wheel speed sensors at fault. He maintains that the diagnostics would report errors, which it is not. He's now wondering if it is linked to the ABS pump and uneven braking by the front brakes. So the car believes the ABS should be applied slightly when its wet to keep the brakes dry, and the fault is then with the front brakes unevenly transferring that to braking the two front wheels. It needs to be checked in the workshop, but it does have a certain logic worth pursuing. Thoughts?

Gee PetrolDave, you know stuff! Would make sense. Warrior193: no, it pulls right when its just raining. Doesn't even need to be heavy rain. Its not the usual brake effect when you hit standing water on one side. Thanks for the thought though.

Thanks for the tip PetrolDave. I'll get it looked into. Diagnostics doesn't seem to have revealed anything in the past maybe because they were completed in the dry. Does it pulling to the right indicate that the driver side front wheel sensor is the fault or should I just get them all replaced?

My Octavia 1.4 (64 Plate) has a possibly similar fault to that on this thread: only when raining, travelling at speed it will regularly (sometimes every 5 mins) suddenly brake hard and pull to the right. Taking my foot off the accelerator resets it and the car will pick up speed again. I have taped over what I think is a rain sensor behind the rear view mirror at the top of the windscreen. However, that has not sorted the problem. Is that actually a rain sensor? Are there other rain sensors I have missed? What other sensors linked to the Braking system can be affected by rain?