DTC B1232-7A: Left Seat - Fluid leak or seal failure: Action

WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

Check for blockage or restriction in seat backrest/seat cushion thermal electric device fan ducts
Check seat backrest/seat cushion thermal electric device fan exhaust vent is clear
Carry out on demand self test using manufacturer approved diagnostic system to confirm rectification. Alternatively, carry out any pinpoint tests associated with this DTC using the manufacturer approved diagnostic system