Hello,

 

I have a Skoda Octavia MKII (2011) I have recently got an orange light bulb warning on the dash. I had the lights checked when I was getting my headlights aligned and the mechanic wasn't sure why the light was on as my lights were all working. I then noticed one of the days my left reg light was out so I thought that was the reason the light was on.

 

The warning on the dash would come on intermittently but would always go off. I then noticed the light would only come on if I turned on my lights but at this point all lights in the back of my car were working. I was doing a pretest for my full driving license (Ireland) and my driving instructor mentioned the light to me and I told him what I said above.

 

He then proceeded to check my lights and we figured out my reverse lights were not working, both of them which I thought was weird. So I went to halfords and got new bulbs and put them in and they still weren't working. So I put the old ones back in, as the bulbs looked fine and now they are back working but now the left reg light isn't working again.

 

I returned to halfords and got two new reg lights, I replaced the left light and turned the car on and it worked so I thought grand it's sorted now. So I replaced the right one and then the left one stopped working? which was previously working. The new lights are LEDs but I can't imagine that would make a difference but I could be wrong.

 

I just wanted to post on the form to see if anyone has experienced this before before I start pulling the car apart looking for wire loom damage? I read on this forum it could be to do with a green fuse in the fuse box in the engine bay but I will check later when I'm home from work.

 

Thanks in advance!

I’ve had a bulb with a cracked filament and a dodgy old bulb holder cause this. 
 

If you have put LED bulbs in they will cause issues unless the correct type and even then they may not be road legal.  The bulb test passes a tiny current through the filament to test the bulb but it can’t do this with an LED.

 

Try replacing the bulbs with new filament ones and see if that fixes it, as it’s an inexpensive test.

Edited 14 November, 20232 yr by cheezemonkhai

48 minutes ago, cheezemonkhai said:

I’ve had a bulb with a cracked filament and a dodgy old bulb holder cause this. 
 

If you have put LED bulbs in they will cause issues unless the correct type and even then they may not be road legal.  The bulb test passes a tiny current through the filament to test the bulb but it can’t do this with an LED.

 

Try replacing the bulbs with new filament ones and see if that fixes it, as it’s an inexpensive test.

Thanks for the reply man! Will have a look at this when I'm home.

 

I had a look again yesterday after work. Basically, I put LED reg lights in and because they're bigger I had to bend the metal prongs of the bulb holder in order for the LED to fit and I believe that was causing the issue with the ordinary bulb as it wasn't holding the bulb tightly in place.

 

I am going to put the old bulbs in when I get home and see does that fix the issue.

 

Will keep you updated, thanks again 

It might be worth popping a new pair of bulbs in just to rule out a cracked filament causing it.

 

If this only happened post LED, then the old bulbs are probably fine.

On 14/11/2023 at 21:16, cheezemonkhai said:

It might be worth popping a new pair of bulbs in just to rule out a cracked filament causing it.

 

If this only happened post LED, then the old bulbs are probably fine.

Okay so I fixed the issue, sort of.

 

I got an OBDeleven scanner and it showed some short/grounding issues with the rear lights so this is something I will have to look at soon.

 

I cleared the errors and I still had a fault for the LED reg lights.

 

I programmed in using the OBDeleven scanner that they were LED and now the bulb light on the dash is fixed!

 

My radio is now not working but that's a story for a different day 😂 thanks for your help!