Left side Tail light working intermitantly

This problem has just happened. Is it a bulb problem a bad earth connection, a fuse or a computer problem ?
Is it likely to be an expensive job to put right?

This problem has just happened. Is it a Bulb problem, a bad earth connection, a fuse or a computer problem.?

Is it in your opinion likely to be an expensive job to put right.?

Check / replace bulb

https://www.youtube.com/watch?v=JDtZhLsYE20&t=52s

Bulbs are not used for the tail lights only for the stop and reversing lights

Bulbs not used for the tail lights. bulb for stop and reversing lights only

So what is used ? LEDs ?

All I can say is that when the device is opened up there are lots of small lights deep inside. The normal bulbs for stop and reverse are at the top, The revering lights have been changed recently to a LED bulbs.

So yours is different from the video where the side light and brake light is a double filament bulb ? If it started after someone changed the reverse lights to LEDs , that will be where your fault lies or in the wiring plug to light assembly

O.K. I`ll return the car to the engineer who fitted the lights and the information he gave me I have passed on to you. He mentioned the possibility of a bad earth connection or even the computer needing attention. He could not see how the led bulb he fitted could affect anything. However I will ask him to replace the LED bulb back to the normal one and see what happens. Be interested to hear your views on this. Thanks.

Have a read at this , explains it better for you and might help you understand why you may be having this fault

https://ledlightinginfo.com/led-brake-lights#:~:text=It%20is%20not%20too%20difficult,which%20I'll%20cover%20below.

Thanks, This could be the problem as shown on he net. I have printed it off to take to the person fitting these bulbs and await his comments. It may be best to put my lights back as they were to avoid having to install special equipment.
Unless he can supply special bulbs or bulbs more suitable to my Peugeot 3008 14
If this fails it will mean a visit to the main Peugeot dealer. Thanks again.

Hope you get it resolved o.k . Try to avoid dealership cost if at all possible . Best wishes