T6.1 ACC issues with new wheels

Bga86

New Member
Hi Guys/gals


I wonder if someone has an answer to an issue I’m having, I realise this has been mentioned before and there’s a lot of people who’ve had the issue but no one seems to have posted a confirmed fix for it.

I’ve recently replaced my T6 with a T6.1 T30, it has ACC. I’ve started adding a few bits to it and today removed the standard 16” wheels and fitted a new set of 20” wheels with 275/40/20 tyres on. After driving about a mile down the road I got a “ACC deactivated, sensor impaired fault” on the dash.

Having done some reading it seems this is a relatively common issue, some people are saying it’s down to the speedo not reading accurately and the tyres/wheels need to be smaller some are saying it’s down to the ACC sensor now sitting higher.

I’ve also read that the speedo can be adjusted using vcds, now I have vcds (novice user) but am reluctant to start messing with this as I’ve also read it cannot be put back down on a T6.1 should you change back to smaller wheels.



I appreciate this is a long post but any advice or help would be most welcome please
 
My 6.1 started doing that when I put a new gloss grille on it. Nasty yellow warning triangle comes on for a few minutes every week on average. Sensor impaired fault, I haven't got ACC. Have you fitted a new grille?
 
My 6.1 started doing that when I put a new gloss grille on it. Nasty yellow warning triangle comes on for a few minutes every week on average. Sensor impaired fault, I haven't got ACC. Have you fitted a new grille?
Yes I have, the grille was fitted last week and I’ve used it plenty without any faults until the wheels were fitted though?
 
Yes I have, the grille was fitted last week and I’ve used it plenty without any faults until the wheels were fitted though?
I had 20's on long before the new grille. It wasn't an off the shelf grille, it was a body shop sprayed one. That's the only current warning I'm getting, it's relatively fleeting and it goes away quickly enough, but the grille looks good, I'll live with it!
 
So I've just put the info into will they fit and it’s showing the speedo will now be under reading quite a bit
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70mph on my speedo on my van equates to 74mph on waze.
I'm hoping to collar a wonderful person who uses VCDS at one of the forum gatherings to put mine right, eventually! No rush....! Keeps the miles down a bit!
 
My 6.1 started doing that when I put a new gloss grille on it. Nasty yellow warning triangle comes on for a few minutes every week on average. Sensor impaired fault, I haven't got ACC. Have you fitted a new grille?
Wayne take the grill off and rub the square area down with scotchbrite to remove the paint. Message or call me if your not sure mate
 
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