I have copied &pasted below the Hidden secret codes on your driving licence, that was published on the Costa Blanca police www.n332.es web page. Though it does not give you a expanation of why you may have certain codes you can see what codes mean, then you can go ask Traffico, hope this helps
CODE NUMBERS ON THE DRIVING LICENCE
Decoded: the secret code on the driving licence
Here you have the jumble of numbers: At first glance, the many figures on your driving licence are confusing. We will decode the secret key for you.
That is what is hidden behind the code numbers on the back, under the OBSERVATIONS section, numbered 12.
You have to wear:
01 You have to wear corrective lenses and/or eye protection if this has been expressly required by a doctor’s note:
01.01 Glasses
01.02 Contact lenses
01.03 Safety glasses
02 You require a hearing/communication aid
03 You need a prosthetic/orthotic limb
05 Driving restrictions for medical reasons
05.01 You may only drive in daylight
05.02 Restriction to within a radius of … km around your place of residence or within city limits/within the region …
05.03 You may only drive without passengers/pillion riders
05.04 Restricted to a maximum permitted speed of … km/h
05.05 Only with passengers holding a driving licence
05.06 Without trailers
05.07 Not valid on motorways
05.08 No alcohol
Please, look at the photo and check if you have the code 01, if you have it, you must wear glasses/ contact lenses while driving.