Ok so fault code 01496 regarding fog light issue you've sorted it from what you've mentioned.
Fault code 02071 is possibly a bad connection somewhere, and I think as you've also got fault code 00153 this could well be a dodgy connection with a different control module that shares the same wire. Car body ECU is stating it's lost signal reference with certain car body equipment devices. Sometimes if you get code 02071 and it's logged alongside code 00153 this can also be related to water ingress, either in a connection plug or control module, which ever it is it's a connection signal loss.
I think fault code 00914 again this is a connection fault somewhere, the car body equipment ECU is saying it's lost signal reference with the N/S/R window.
This communication loss is either with window regulator motor, or the window switch, or the wiring loom. This might be a warn window regulator, but it also could be related to the other connection fault codes you've listed ??
You'll need a test light or multimeter to test for earth, power and resistance signal, to
help pin point the possible wiring fault connection issue, like I say could be a bad connection or wirring fault, including water ingress that can affect wiring signals in loads of weird ways.
I think on some twin individual front wiper motors they can sometimes have a marker alignment line or notch, that you have to align the wiper crank arm or spindle up with, either with motor bolted up or unbolted before fitment, but with the wire connector plugged in, but like I say this varies from make and model of car. But I think on your
MK2 Leon you possibly have to align the motor's first before you attach the wiper arms, as one motor is the master one and the other is the slave which must receive the correct signal/s from the master motor, there's a possibility you might need a comprehensive scan tool to aid the synchronization of the two motors. The convenience control module I think has to be able to communicate with the master motor, that I think might have a module receiver that'll need encoding to the ECU, which then possibly like I say enables the correct alignment signals between the two wiper motors ??
It's either an electrical wiring connection issue fault or the master wiper motor needs encoding correctly to ECU.
Have you got a workshop manual like the Haynes manual for your MK2, as it could have the procedure regarding each individual wiper motor alignment, I don't have a manual for the
MK2 Leon unfortunately.
Hope this helps
Si