Morning All,

I've installed 275/55R20 ATs which are working fine however the other day I used the IID Tool to set the wheel radius to 405mm to correct the Speedo and etc.

Now I have the following problems even though 405mm is the radius of 275/55R20 tyres:

1. Speedo now reads 3kph over at 100kph.
2. The error code: P0501-00 (AA) Vehicle speed sensor A range/performance

Does anyone have an idea what the issue is?

Cheers

Guy 2006 RRS S/C CONSTANTLY under modification...
1994 RRC 4.2l not LSE sadly gone but not forgotten
LR Defender 300Tdi - affectionately know as "The Black Beast"

Some of the speedo correction values cause the car to throw a wobbly

Revert back to standard

Thanks Mikey,

I'll reset to 389mm which worked (radius for 275/40R22) and see how it goes.

One thing I do have and I can't work it out is that occasionally oon tighter left hand turnd (say a roundabout) the front left wheel either seems to rub somewhere or the traction control tries to brake the wheel as it judders and pulls the car tighter into the corner whilst slowing it down.

Taking the foot of the accelerator and easing the steering angle back stops it....

Cheers

Guy 2006 RRS S/C CONSTANTLY under modification...
1994 RRC 4.2l not LSE sadly gone but not forgotten
LR Defender 300Tdi - affectionately know as "The Black Beast"