Lexia has given me code P0338; this points to the Crankshaft position sensor.
On servicebox, the part is described as Speed Sensor, part number 1920GJ
When I removed the LDS pump I caught a glimpse of the sensor currently fitted to my car:
It looks like it's pretty easy to replace.
The only issue is where to source the replacement. Citroen will want £42 for it.
I have had a quick look on mister auto and there are a few different makes (and prices) on there: https://www.mister-auto.co.uk/sensor-cr ... _g833.html
I should be OK with any from that list. I'm leaning towards the Febi one for around £20 as they are a reputable OEM manufacturer and around half of the price.
Has anyone replaced this sensor before and if so which one did you use and were there any difficulties?