Air Bag Light

I suggest that you get in touch with CrashDATA.  They are experts and will be able to explain the problem to you.  

CrashDATA

In a nut shell your Airbag Crash Data Module will at best need resetting (about £100) and at worst need replacing (about £400 or much more if you go to a Peugeot agent).  Good luck.  

 As the STS light came on due to a flat battery, I think LLM is being overly pessimistic. I'm sure that a decent local garage that has a reasonable code reader eg SnapOn would be able to reset the warning light without going to Peugeot. And I doubt you'd be charged as much as £100.

IMHO it's a good idea to own some kind of electrickery gizmo to be able to 'talk' to your car .... they can pay for themselves fairly quickly https://ljmcardiagnostics.co.uk/collections/peugeot-diagnostic-tools

I hope for Oakley's sake that you are right but have been there, gotten the scars and lighter wallet, I remain pessimistic.  

The only times I've had a SRS warning (fat fingers above 🙄) is when batteries have been disconnected (Merc) or me disconnecting part of the system & then turning the ignition on (Vaux) ... reset OK with a diagnostic gizmo. My son though drove & drove his car with a goosed alternator until the SRS light came on (similar to OP's fault ... ????) and that reset OK on a local garages SnapOn reader. 🤞

Google it. Loads of advice and easy fixes . Dealer visit just not needed. The most common fix seems to be disconnect the sensor from vehicle battery wait 30 seconds then reconnect. If your not sure check some of the moho owners forum. 

It's common to pretty well all Fiat Peugeot Citroens.

Tj

Citroens do seem to play to a different set of rules. Every other car I own & have owned with air bags, the light goes off straight away after starting, on EmilysMum's Citroen however, it takes maybe 10 secs to go off. Questioning this at Citroen, he said they can take up to 20 secs to go out!

You say you have charged the battery. How and what is the reading with the engine not running. Most car dash boards light up like an X-Mas tree due to low battery and eventually self cancel when the battery is correctly charged. At 12.2 - 12.4 it is still low. It should be showing in excess of 13v.

Colin

We had the same problem last year. Luckily my nephew has a garage and although he wasn’t able to resolve the fault code he recommended a company called Coastalmotorhome.co.uk. A new one from them cost £140

A fully charged battery at rest after about 24 hrs should show between 12.6 and 12.8 volts.

Good Morning

Thank you all for your helpful replies. We do have a fully charged battery & will be taking it for a diagnostic test on Tuesday. Will update when this has been done with the result.