Lexia code says:
Permanent fault
Front LH wheel speed sensor signal Open circuit, short circuit to positive, short circuit to earth
A suggestion for this fault is to remove the offending sensor and clean the magnetic track. It is also worth cleaning the sensor. There was more dirt on the sensor than the track for this C3.
To remove the sensor and clean the magnetic track, remove the 13mm rusted bolt, and keep the broken washer (it is still has one). Lever up, carefully, without breaking the plastic, the whole sensor from its housing. You can see it partially lifted in the picture. Getting started is the hardest part.
With the sensor removed, it can be cleaned with a cloth. A small brush or rolled up cloth and be poked into the hole. With the brush or cloth in place, rotate the brake disc to simulate wheel rotation and clean the magnetic track.
Refitting the sensor is much easier than removal, but it is still tight in its housing, tap it back into place.
While I was there, I loosened the inner arch near the side repeater to access the ABS Sensor plug to meter it. 1666 ohms seems ok, and put it back together.
The fault didn't come back with the ignition, stayed off for a run and more importantly, stayed off for the MOT tester
