I resolved the issue - entirely my fault! When I fitted the new front level sensor, I got the bracket upside-down and it broken the sensor arm. Presumably this was therefore giving an invalid level error and preventing calibration.
Fixed it and all working now!

Apologies if I’m posting this in the wrong place… I’ve used this software for my 159 a good few times and it’s been fantastic. Even just programmed new injector codes after having my injectors reconditioned. I’m now trying to calibrate the head light level. I’ve done this before and it worked perfec...