Can anyone help me, I had rear passenger corner sagging a little so purchased a gap iid to diagnose the issue turns out it was the height sensor so I have replaced the sensor and tried to calibrate,it allows me to set all corners to 461mm but when go to save settings it says unable to save fault e50 can anyone shed some light on this

Should the rear not be 465mm, fronts 461mm?

Have you done physical measurements from wheel centre to top of wheel arch? 2019 5.0 SC SVA (Current)
2012 5.0 SC AB. Sadly written off by a campervan
23 plate Focus ST (Current)
1942 VEP Ford GPW Jeep (Willys) (Current)
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Thanks for the reply, the iid tool says 461mm all way round, would 4mm make it not save settings? Im measuring from the centre of the hub to the wheel arch lip, Another thing not sure of but on a few posts on various forums it mentions the car needs to be in tight tolerance mode from what I understand it's done by removing the eas relay but just going off the guided calibration on the iid tool nothing is mentioned about tight tolerance mode

No I don’t think tight tolerance mode is needed.

This is what I was going from.

Click image to enlarge

Might well be wrong here but if you have removed a EAS relay have you not in effect disabled the eas, so how is it able to know what you are trying to do as it will not be able to do anything. I think the tight tolerance mode is used primarily for 4 wheel alignment not suspension calibration. There are a lot of member on here who have done the calibration and I'm sure one will be along shortly to tell you where you may be going wrong.


Cheers
Col

That's exactly what I thought col, maybe disabling the eas you can set the height baseline so it can't move the height itself to what ever the car thinks is level,yeh hopefully someone can help as I don't fancy RR dealer prices for labour

I can't see anything in the Gap Users Manual about removing the eas relay during calibration, but did see this.

CAUTION
The tight tolerance mode should only be used when a wheel alignment
is performed. Leaving the EAS ECU permanently in this mode
can lead to premature failing of components.

Cheers
Col