Hello everybody,

 

I used the research function but sadly I couldn't find any answer to my problem :( 

 

I have recently installed some Philips Xtreme Ultinon Gen 2 H7 LED (with can bus module) instead of the classic halogen light bulbs in my skoda superb facelift 2014 but when I turn the ignition on, the instrument cluster tell me to check those bulbs :( 

 

I clear the error code with VCDS but every time I switch ignition off and on it come back. 

 

Is there a way to disable the check of thoses lightbulbs because apparently the canbus module doesn't work.

 

I apologise for my english ^^

 

Put back in the halogen bulbs it was designed to use and you'll have no problems. The beam pattern from LED bulbs will be completely wrong for a lamp designed to work with halogen bulbs anyway, no matter what the marketing says.

 I know that, but I don't like to have halogen bulbs next to the xenon. 

 

It's really weird to have something so modern like the xenon next to an old fashion bulb

 

I found this video on YT does anyone have already test this ?? 

 

 

 

I'd rather have something that works properly. If the xenon bulbs are old, your money would be better spent replacing them as they degrade over time and the light output drops.

Your 2014 superb checks the current consumption of your headlights which have 55w halogens. Your led bulbs don't take enough current so it thinks they are blown. The only official lighting alternatives on your Superb are Xenon bulbs (plus ballast) but even those take 35w, it also needs a recode with VCDS to accept the lower Xenon bulb consumption.

 

Unlikely that there is a coding option to lower the expected consumption to 25w which is what those LEDs take, but the Xenon coding might just work.

 

The other way to fix it is to add a parallel load to push up the consumption, without the Xenon recode you'd need to fit a 5 ohm resistor in parallel which in turn would have to dissipate 40W (it'll get bloody hot) so a minimum of a 50w aluminium clad power resistor mounted on a suitable heatsinking surface. On each bulb.

 

With the Xenon recode youll get away with a 20 ohm power resistor dissipating 10w. Use a min. 15w power resistor, on each bulb again.

 

The resistors will get very hot, so watch out for melting insulation and other safety issues if you go down this route.

 

The Philips LEDs are not ECE homologated and are not road legal, so you might be failed on the MOT. (‘contrôle technique’)

 

edit: On further checking I'm not sure if there is Xenon option for main beam bulb on a mk2 superb which may always be fitted with a halogen bulb, so maybe no coding option available as I suggested.

 

Edited 2 August, 20214 yr by xman

Ok... so I just need to put them back for sale  

 

Thanks for the reply @xman and @chimaera

You can buy halogen bulbs with cool white colour output if you want to match the halogens to the xenons.

Just use resistors

54 minutes ago, aero-hot said:

Just use resistors

That won't change the fact that LEDs won't work correctly in a lamp designed for the light output characteristics of a halogen filament bulb. Beam pattern will be all over the place, and potentially dangerous for other road users.

Mine work fine, the beam pattern is set by the headlight unit not the bulb as both halogen and most led bulbs are omnidirectional. When tested, properly at the IMI test facility, the beam pattern remained identical. The headlamp unit directs the light it is provided with. In the main beam, it would of course be irresponsible to keep them illuminated when approaching oncoming traffic, but I would have thought that didn't need pointing out. Technology moves on and whilst it's important to keep many things standard, some things can and in my case have been improved by upgrading. The Superb is a great base car, but it's still built down to a price rather than up to a quality. There's a lot of really useful helpful information on here, but if I'd paid attention to the naysayers I'd have sold my boring taxi months ago. 😉

2 hours ago, aero-hot said:

Mine work fine, the beam pattern is set by the headlight unit not the bulb as both halogen and most led bulbs are omnidirectional. When tested, properly at the IMI test facility, the beam pattern remained identical. The headlamp unit directs the light it is provided with. In the main beam, it would of course be irresponsible to keep them illuminated when approaching oncoming traffic, but I would have thought that didn't need pointing out. Technology moves on and whilst it's important to keep many things standard, some things can and in my case have been improved by upgrading. The Superb is a great base car, but it's still built down to a price rather than up to a quality. There's a lot of really useful helpful information on here, but if I'd paid attention to the naysayers I'd have sold my boring taxi months ago. 😉

Yes, and the headlamp unit is designed to capture and focus the light from a halogen filament bulb, not an LED array. LED bulbs are a great technology but only if used properly in light fixtures designed to work with them.