Three amaigos

Hi I'm new to this sight but have found it very useful already. I'm getting the fault code 4068
current sensor left hand
rear sensor. I've fitted a new sensor but no joy.
Anyone have any further knowledge as to what could be the cause?
Thanks in advance

Welcome. Model?

Welcome. This would have been better if you'd asked in the Disco section, assuming that it is on your 2004 Disco 2.
First off I'd be interested to know what code reader you used.
What you're suggesting is that there is a current problem on the sensor on the RNS wheel. A current problem could be a fault on the wiring to the sensor, high current would indicate the possibility of a short and low current, an open circuit.
There is also the possibility that the old or historic fault codes might need to be cleared before the fault indication goes away.
Whereabouts in South Wales are you?