Peugeot 308 seat memory loss

Could check the fuses ,
Peugeot 308 CC mk2 (from 2013) – fuse box diagram
Year of production: 2013, 2014, 2015, 2016

Dashboard fuses
The fusebox is located in the lower left of the dashboard.

Peugeot 308 CC - fuse box - dashboard
Peugeot 308 CC mk2 – fuse box – dashboard
Fuse Ampere rating [A] Functions
F1 — Not used
F2 30 Locking and deadlocking earth
F3 5 Airbags and pretensioners control unit
F4 10 Clutch pedal and dual-function brake switches, electrochromatic rear view mirror, air conditioning, steering wheel angle sensor, automatic gearbox, switching and protection unit
F5 30 Front one-touch electric windows, folding mirrors supply
F6 30 Rear one-touch electric windows, exterior door opening controls
F7 5 Front and rear courtesy lamps, map reading lamps, sun visor lighting, glove box lighting
F8 20 Audio equipment, audio/telephone, multifunction screen, tyre under-infl ation detection, interior storage compartments
F9 30 Front 12 V socket, cigar lighter
F10 15 Steering mounted controls, alarm siren, alarm control unit
F11 15 Low current ignition switch
F12 15 Instrument panel, seat belt and passenger’s front airbag warning lamps display, air conditioning, driver’s seat memory unit, retractable roof unit.
F13 5 Engine fusebox, airbags
F14 15 Multifunction screen, amplifi er, hands-free kit, rain/sunshine sensor, parking sensors control unit, passenger’s seat memory unit
F15 30 Locking and deadlocking
F17 40 Rear screen and door mirrors demist/defrost
SH — PARC shunt
Peugeot 308 CC - fuse box - dashboard
Peugeot 308 CC mk2 – fuse box – dashboard
Fuse Ampere rating [A] Functions
G36 30 Driver and passenger heated seats
G37 5 Trailer fusebox
G38 30 Driver’s seat memory unit
G39 — Not used
G40 30 Hi-Fi amplifi er, passenger’s seat memory unit
Engine compartment fuses
The fusebox is placed in the engine compartment near the battery (left-hand side).

Peugeot 308 CC -fuse box - engine compartment
Peugeot 308 CC mk2 – fuse box – engine compartment
Fuse Ampere rating [A] Functions
F1 20 Engine control unit supply, injection pump and EGR electrovalves (2 litre HDI), injectors (2 litre HDI)
F2 15 Horn
F3 10 Front wash-wipe
F4 20 Headlamp wash
F5 15 Purge canister, turbine discharge and Turbo pressure regulation electrovalves (1.6 l THP 16V), oil vapour heater (1.6 litre THP 16V), Diesel heater (1.6 litre HDI)
F6 10 Vehicle speed sensor, ABS/ESP control unit
F7 10 Power steering control unit, automatic gearbox, engine coolant level detector
F8 25 Starter motor control
F9 10 Diagnostic socket, directional headlamps, air fl ow sensor (Diesel), particle emission fi lter pump (Diesel), door mirror controls.
F10 30 Engine control unit actuators (petrol: ignition coils, electrovalves, oxygen sensors, injectors, heaters, fuel pump, electronic thermostat) (Diesel: electrovalves, heaters).
F11 40 Air conditioning blower
F12 30 Windscreen wipers slow/fast speed
F13 40 Built-in systems interface supply (ignition positive)
F14 — Not used
F15 10 Right-hand main beam headlamp
F16 10 Left-hand main beam headlamp
F17 15 Left-hand dipped headlamp
F18 15 Right-hand dipped headlamp
F19 15 Oil vapour heater (1.6 litre VTi 16V), purge canister electrovalve (1.6 litre VTi 16V), oxygen sensors (petrol), air cooling electrovalves (Diesel)
F20 10 Electronic thermostat, variable timing electrovalves, Turbo pressure regulation electrovalve (Diesel), engine coolant level detector (Diesel)
F21 5 Fan assembly relay supply, Valvetronic relay control (1.6 litre VTi 16V), Turbo cooling (1.6 litre THP 16V), air fl ow sensor (1.6 litre HDI)
Table of mini and midi-fuses over the battery
Peugeot 308 CC - fuse box - above battery
Peugeot 308 CC mk2 – fuse box – above battery
Fuse Ampere rating [A] Functions
F1 — Not used
F2 5 Dual-function brake switch
F3 5 Battery charge unit
F4 25 ABS/ESP electrovalves
F5 — Not used
F6 15 Automatic gearbox
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market

The only fuse that is dedicated to the seat memory is g38.

That’s fine though.

and nothing else has failed so I don’t think any other fuses are the problem.

On some cars I have seen a low battery nullifying the seat memory .Since Covid and lack of use / short journeys , I have heard of two , but they were Fords . Might , might not be relevant to your car .

Thank you.
But Probably not.
Does a fair number of long journeys, 300 miles last two days as an example…