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Well as you know I've upgraded to 275/55R20 tyres. Until 2 days ago I hadn't bothered to change the wheel radius to adjust the Speedo etc but thought I'd do it with my IID tool and see if this cures the random ABS activation.

However I've now set the radius to 405mm for the 275/55R20s and now the Speedo is showing 3kph above actual speed at 100kph and the following error code:

P0501-00 (AA) Vehicle speed sensor A range/performance

Does anybody have any ideas? For me I would have expected that if I set the radius correctly then there shouldn't be a problem.

What have others done when they put 275/55R20 boots on their Sport?

Any help would be welcome.

Happy Weekend

Guy
 

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I adjusted my tire ratio with the IID tool by calculating the % increase from 29" tire diameter to 32" then added that same % to 353 (the original setting in the IID tool) and tested with a GPS. I think it was 353 for stock 29" tires and now 388 for my 32" tires.
 
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