Hello everyone,

I decided to post my problem here since it drives me crazy since two years ago when first appeared. Maybe someone knows what's happening. I mention that I have asked on many other places online and offline and I couldn't find an answer.

So, my problem: When I drive on wet conditions (rain or snow) after 120 km/h the ABS error warning with three lights (abs, esp and parking brakes) and sounds comes up on dash and stay there untill I stop and start the engine again. The ABS unit in my car is ESP FRONT MK60-AT 0102 with HW: 1K0 614 517 AC. The error stored is 01130 ABS, 008 - implausible signal - intermittent. The only answer I've got till now is to replace the unit since it is faulty, but a new one if it does existed (does not) it will be too expensive for my old car, so I went to a specialized repair unit shop and the engineer there tested my unit and told me it is working in parameters and doesn't need to be replaced but for the test he fitted a repaired one and same thing happened with this one too. I have to mention that I also replaced all 4 wheel knobs with magnetic rings (new febi bilstein) and also all 4 ABS sensors with new OEM ones. What I don't understand is that on dry conditions everything works perfect and ABS and ESP are working (on gravel for example). Also on wet under 120 km/h which I think it is real speed 110 km/h (there is a discrepancy between the speed on dash and the real speed) there is no problem with ABS and ESP.

Has anyone any informations on this or did encounter this problem too?

P.S. Please excuse my english if I made mistakes. English is not my first language and it is a while since I last wrote in English.

Thank you!

If it happened again with a known good unit then it could be wiring fault or perhaps fuses. On my sons mk1 fabia there are strip fuses near the battery compartment. I think octavia may have a sealed strip of fuses instead of individual. On his one had a hairline crack that randomly broke contact and caused ABS brake warning light to come on. The crack was so small that you couldnt see it until I removed fuse and it fell in two. Replaced fuse and it cured it. As its happening in the wet It may be wiring,fuse related thats losing connection due to dampness or perhaps a poor earth. Check the fuses beside the battery compartment for loosness,blown or corosion.

Thank you for your sugestions. Unfortunately I have already checked all that and there is no problem. The realy bothering thing is that it's happening on wet but only when I drive over 120 km/h. I'm in Germany and I drove on autobahn in heavy rain (with aquaplaning) under 120 (90-100km/h) and there was no problem, the ABS and ESP worked when was needed (I saw the light on dash and felt it on the wheels). Only over 120 there is that problem, but the systems works even if those lights pop up. That is the reason nobody couldn't figure out what's happening. Someone told me it could be a problem in the ECU but I don't know for sure and to replace the ECU is a bit extreme for my problem. I'm wondering if there is another module for ESP where the speed is analized....

If everything works at low or high speeds and you have checked wiring etc even though the lights are on it may be a wiring/dash/cluster fault. I have had similar problems on my old octavia 1.9tdi with random warning lights coming on that make no sense like DPF when there is none and ABS although everything worked. In my case it was the connector at rear of dash that was loose/dirty. I cleaned it and reinstalled cluster and the lights disapeared. If there is corosion/bad contact somewhere it would make sense as it only happens when wet. Remember to disconnect battery before remoing cluster if you are going to as you can enable imobilser. Sorry cant be of much more help

Alasdair