VSC Failure Warning - Alfa Romeo Forum
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(Post Link) post #1 of 9 Old 22-08-16 Thread Starter
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VSC Failure Warning

Hi all

My 147 keeps momentarily slamming the brakes on for a split second, then the VSC warning comes up on the dash, Someone mentioned that it could be dirt in a sensor? does anyone have any experience of this?
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is the tyre wear even on all 4 wheels, and pressure ok ?
System doesn't like it if f.i. circumference of 1 tyre is different....
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(Post Link) post #3 of 9 Old 22-08-16 Thread Starter
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Originally Posted by jwq View Post
is the tyre wear even on all 4 wheels, and pressure ok ?
System doesn't like it if f.i. circumference of 1 tyre is different....
I'll check after work, think they are all ok, Thanks for that advice though, I'll get back to you on that
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Is the steering straight on it?
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On a generic car forum in Belgium someone is having the exact same issue with his GT: while accelerating or general driving (not braking) the 4 wheels lock up occasionally.

No solution so far.
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(Post Link) post #6 of 9 Old 03-09-16 Thread Starter
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Hi All

Update!

I checked tyre pressures, all ok, now its a VDC or something warning, but yesterday it decided to slam the brakes on for me as I left a motorway and approached a roundabout!, off to the garage for it I think!

the alarm seems to kick in if I turn left and load the front right tyre
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The VDC yaw sensor might be a contributor, this has to pass through three sets of plugs - one at the unit, then the interconnect between the fascia harness and the front harness, finally the ABS/ESP bloc. Not hard to imagine a little stress or moisture might be compromising the signals. Try a proper contact cleaner/lubricant spray on the connections - not WD40 or similar. While you're at it, do the pedal box harness plug too (engine side, green banded round connector).
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the one on the belgian forum finally threw a yaw sensor fault code, so like addo says is certainly possible
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I'm relieved to hear that - thanks for the update (I'd been wondering).

My initial experiences led me towards a loose wheel bearing causing a bad signal from the corresponding ABS sensor, but cleaning and physical examination did nothing - and we Aussies don't get UK style corrosion of chassis and suspension to mess things up.
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