Ever since I've had the front left ABS sensor loom repaired, I've also had a another issue that I'm scratching my head with.

When going over a rough surface or pot hole under the right wheels, sometimes the esp light flashes momentarily, and at the same time the speedometer would drop several mph for a brief moment, then pick back up again.

I've had the Esp light flash so much over a rough piece of road that it permanently lit the light until I'd stopped and restated.

If I'm on cruise control, it almost always turns off at the same time, but sometimes the cruise will go off without illumining the light if only a slightly rough surface.

I've had the car scanned a couple of weeks ago, and got the below fault.

00285 - ABS Wheel Speed Sensor; Front Right (G45) 012 - Electrical Fault in Circuit - Intermittent

Ever since the scan, I've not been able to replicate the esp or speedo problem.

Since clearing the fault code, it's not come back on.

The cruise control still does turn off when going over most bumps under the right wheels.

I've tried flicking the cruise control stalk when it's on in case it's a loose connection inside the stalk, but it stays on fine.

Previous thread below.

http://www.briskoda.net/forums/index.php?/topic/344502-ABS-Sensor,-Loom-or-Teves-MK60-ESP/ABS-Pump-Problems.

Help for suggestions?

Any one with any ideas?

I tried logging the speed sensors values with vcds, but even after a very short trip round the block, it said there were too many errors to continue, even though the esp light didn't come on.

Might be worth checking the fuses for loose or dirty fuse contacts. Below is a copy of a report from honestjohn in the Octavia 2 review:

 

"If ESP/ABS amber warning light comes on intermittently and will not re-set, you might not actually have the ATE Teves Mk 60 ABS/ESP problem. First check circuits and start at the ABS fuse and holder (no 9 on a Golf, on scuttle edge by driver door). Pull it out, have a look and if okay replace it. The warning light may then go out. Sometimes they slip out a bit and become wobbly, which is enough to set off the warning. "

That sounds plausible. With the fuse box on the right hand side it could explain why it does it.

I'll give it a check over.

Edited 9 May, 201511 yr by softscoop

I had a look at the fuses, and the ESP fuse was not pressed in fully. I assume this is from when it was previously repaired.

I've pushed the fuse all the way back in and I cannot get it to flash up ESP when going over bumps, so that looks fixed.

The cruise still goes off over some bumps, but not as much as before. Could the brake pedal switch be activating when jolted? I suppose I could log the brake pedal activation with vcds.

Well strangely this has fixed itself.

 

The speedo no longer jolts, and the cruise control stays on.

 

I can't remember the last time I had the esp light flash on either

 

 

Magical Octavia.

Fingers crossed I have now fixed this properly, as it reappeared again big style on Saturday.

 

Went to visit some friends holidaying in a village in the middle of no where, so bumpy single track roads for miles to get to the place.

 

The speedo was bouncing all over the place, doing 30, it was jumping down to 25 and up to 35. You could feel the car tugging as it broke individual wheels as it thought the car was skidding. Coming to a stop the ABS was also kicking in.

After a while, it obviously had too many errors, so it threw up the ABS, ESP and TPMS lights. Obviously at this point it stops taking readings from the sensor that's caused the fault, as the speedo was fine while the lights were on.

 

 

 

I had proper look at the car yesterday, and it was pretty obvious that I'd caused this.  :peek:

 

Scanning the car, I had again: 00285 - ABS Wheel Speed Sensor; Front Right (G45) 012 - Electrical Fault in Circuit - Intermittent 

 

Took the wheel off, disconnected the sensor cable, and there was the problem. 

When my left side was faulty, I'd disconnected the right side to check the voltages as a reference. To do this I'd used the probe from my multimeter on the contacts inside the connection. 

 

It seems that I'd pushed one of the contacts partly inside the connector with the probe without realising, so although it was making a connection most of the time, it was coming adrift during bumps...

I've put the connector back to where it should be, and on my way in into work this morning, deliberately going over bumps, no more problem

 

Edited 8 June, 201511 yr by softscoop

Just in case anyone every comes across this thread in the future, it's possible to just buy the connectors with a length of cable for repair.

 

http://www.ebay.co.uk/itm/151534276184?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT