LED bulb errors annoying me now...

[OneSlowBoi]

Hi everyone

 

A couple of months ago I decided to do a full LED Upgrade to my 2006 Skoda Octavia mk2 Elegance.

 

I replaced the main beam with Auxito Y13

High Beams were replaced with Auxito M3

Fog Lights replaced with Auxito Q16

Front & rear Indicators were replaced with ARGO LED P21w

Reverse Lights replaced with Chinese LED Bulbs

And brake lights were replaced with another off brand Chinese Bulb

 

All lights work perfectly with no issues however for some odd reason, when I have my main and fog lights on and I turn on my indicator, after 4 flashes I get an error and it seems to get triggered when I have my steering wheel turned to the direction I am indicating to.

But this is the weird part because the issue only seems to happen while the car is moving and not stationary.

I then get an error code on my turn signal bulbs I used (which are Argo LEDs) and with that another error code 01598 Drive Battery Voltage comes up.

My cooling fan then goes on full blast for no reason either though my cars engine is cold and not up to temperature, and it's diesel too...

 

I have used Carista to turn off the cold bulb checking sequence which means I get no bulb errors up until I physically turn on the bulbs.

The LED indicator bulbs work perfectly without the fog light on so when I indicate, I have to turn off fog lights, then indicate as a workaround.

 

I would love to turn off the warm diagnostics on the bulb checking as I think that is partly the issue for my problem. Can somebody tell me if that is possible using VCP? (Vag Can Pro)

 

So I am only thinking this could be due to the load put on the electrics when the car is moving? Please share some light on this lol

[KenONeill]

1 hour ago, OneSlowBoi said:

Reverse Lights replaced with Chinese LED Bulbs

And brake lights were replaced with another off brand Chinese Bulb

Possible clues in bold.

[pikpilot]

1 hour ago, OneSlowBoi said:

when I have my main and fog lights on and I turn on my indicator.....

Have you got corning lights selected via Carista?

[OneSlowBoi]

@pikpilotNo I haven't got them enabled.

What's odd is that I don't have an option for cornering lights in Carista.

I think that is due to the fact that my car was manufactured in 2006. As far as I believe, models made in 2007 have cornering lights as an option.

[OneSlowBoi]

1 hour ago, KenONeill said:

Possible clues in bold.

Thanks for helping @Ken0Neill but I haven't ran into any issues with the brake and reverse bulbs. They work without any errors and I think I paid £40 for both of them.

I suspect it's down to the indicator bulbs as that's what it shows on the OBD Scan.

 

I hope someone can help me out who knows VCP to tell us how to disable bulb checking. That would really help. 😅

[langers2k]

The CECM is too old to support LEDs so VCP won't help...

 

Load resistors are probably your best option. Or the original halogen bulbs 🤔

[OneSlowBoi]

2 hours ago, langers2k said:

The CECM is too old to support LEDs so VCP won't help...

 

Load resistors are probably your best option. Or the original halogen bulbs 🤔

You are probably right @langers2k, but what's the difference between a BCM and a CECM?

Do older VAG cars use BCM? and do the newer ones use CECM module?

Or are they completely separate units?

Sorry I'm a total noob on this 😅

 

I don't have VCP at the moment however I'm looking at getting it as I have seen this video on YouTube showing how to configure the BCM module on a VW Scirocco with the PQ35 platform that the Octavia Mk2 is based on.

On the video, it shows a tickbox about diagnostics, is that for bulb checking or am I completely wrong? 🤔

 

 

[langers2k]

Other way round I'm afraid...

 

Older cars (MK5 Golf and pre-FL MK2 Octavia) use a CECM (Central Electronics Control Module) and CCM (Comfort Control Module) to control various functions including the exterior lighting. As you've found, there is very little customisation for lighting.

 

Around 2009 (MK6 Golf and FL MK2 Octavia) the CECM/CCM were replaced by a single combined BCM (Body Control Module). As LED lighting options started being fitted, the BCM had to support LED lighting. Due to this, the lighting configuration got more customisable but wasn't well understood for quite some time, hence the infamous byte 18 issue...

 

Quick note: BCM's 18th byte is linked to the lighting configuration and when the factory value is 00, changing it means the car will lose it's lighting config potentially leading to many weird issues. It is fixable but not typically with just VCDS/OBDeleven etc.

 

The video you posted is specific to BCM's. Some clever folk did some work to reverse engineer how the lighting configuration worked and where it's stored, probably down to the byte 18 problems! This means it's now relatively customisable compared to the earlier CECM/CCM combo. Unfortunately, it doesn't apply to your car so won't help your issues. Swapping from a CECM/CCM to a BCM is possible but it's a massive amount of work and rewiring.

[OneSlowBoi]

11 minutes ago, langers2k said:

Other way round I'm afraid...

 

Older cars (MK5 Golf and pre-FL MK2 Octavia) use a CECM (Central Electronics Control Module) and CCM (Comfort Control Module) to control various functions including the exterior lighting. As you've found, there is very little customisation for lighting.

 

Around 2009 (MK6 Golf and FL MK2 Octavia) the CECM/CCM were replaced by a single combined BCM (Body Control Module). As LED lighting options started being fitted, the BCM had to support LED lighting. Due to this, the lighting configuration got more customisable but wasn't well understood for quite some time, hence the infamous byte 18 issue...

 

Quick note: BCM's 18th byte is linked to the lighting configuration and when the factory value is 00, changing it means the car will lose it's lighting config potentially leading to many weird issues. It is fixable but not typically with just VCDS/OBDeleven etc.

 

The video you posted is specific to BCM's. Some clever folk did some work to reverse engineer how the lighting configuration worked and where it's stored, probably down to the byte 18 problems! This means it's now relatively customisable compared to the earlier CECM/CCM combo. Unfortunately, it doesn't apply to your car so won't help your issues. Swapping from a CECM/CCM to a BCM is possible but it's a massive amount of work and rewiring.

Thank you so much @langers2k👍

I guess that explains why I don't have options like cornering lights for my vehicle as that works only on BCM's and I guess that explains why a lot of videos I see where people have turned off bulb diagnostics were done with VAG cars newer than 2009.

 

What I'll probably do is replace my led  indicators back to halogens and see if I have any issues and I'll update you guys on where I'll go with this 😅

My fog lights have built in load resistors in the bulb itself which is good as I have no errors with those but it's odd how just by turning on an indicator for a few seconds can cause the cars cooling fan to turn on at full speed.

 

Here are the LED fog light bulbs I'm using currently

https://www.ebay.co.uk/itm/185535671644?hash=item2b32c9ad5c:g:rqgAAOSwRtJi9mfp 

 

ARGO LED Indicators that are giving issues

https://www.ebay.co.uk/itm/133929873450?hash=item1f2ed7b02a:g:byoAAOSw--BhjErD 

[langers2k]

Some CECM's support cornering fog lamps...

 

 

https://www.briskoda.net/forums/topic/192349-drl-and-cornering-fogs-pre-fl/?do=findComment&comment=2314761

https://www.briskoda.net/forums/topic/192349-drl-and-cornering-fogs-pre-fl/?do=findComment&comment=2314788

 

[OneSlowBoi]

2 minutes ago, langers2k said:

Some CECM's support cornering fog lamps...

 

 

https://www.briskoda.net/forums/topic/192349-drl-and-cornering-fogs-pre-fl/?do=findComment&comment=2314761

https://www.briskoda.net/forums/topic/192349-drl-and-cornering-fogs-pre-fl/?do=findComment&comment=2314788

 

Hmm, maybe it could be due to Carista not showing that option. I'm planning on getting VCDS so maybe that may show cornering lights as an option.

I'll probably take a look underneath my steering wheel so see what CECM module I have and take a photo of it 👍

[Crasher]

VCDS may help you code some of those out but possibly not the headlights. You do realise that all those bulbs are illegal and an MOT failure? I disagree with this to a certain extent as I have to run LED number plate light as I always drive with sidelights on and incandescent bulbs damage the rubber gasket when used like that in a 1U number plate light holder.

[OneSlowBoi]

1 hour ago, Crasher said:

VCDS may help you code some of those out but possibly not the headlights. You do realise that all those bulbs are illegal and an MOT failure? I disagree with this to a certain extent as I have to run LED number plate light as I always drive with sidelights on and incandescent bulbs damage the rubber gasket when used like that in a 1U number plate light holder.

I actually have LED lights installed on my main dipped beam and have had no errors but from what I've found, the rest of the lights have bulb check monitoring except the rear sidelights and mirror indicators.

[OneSlowBoi]

ok, so I replaced my LED indicators back to original halogens P21w to test to see if I have any faults while my front fogs are on like before.

 

And although I didn't get any fault codes for indicators (which is expected)

While having the fog lights on, when I increase my revs to 1500rpm and back to idle, the idle rpm then increases from 800rpm to 1000rpm and then cooling fan goes on full.

I got that p01598 Drive Battery Voltage code again and also a new one p02195 Instrument Panel Light Dimmer Switch (E20)

After restating the car again, I can then erase those error codes.

 

So it seems to me that the Auxito Q16 LED bulbs that I'm using for my front fog lights seem to mess up with the Drive Battery Voltage and throws an error as they maybe drawing too much wattage from the car.

I've now put the ARGO LED Indicators back in and put the Halogens back in on the front fog lights and have had no issues.

 

I do have another H8 LED Bulb which I used by Nighteye but they are not error free however despite that, they don't have issues with the Drive Battery Voltage (probably due to them drawing less wattage and having no load resistors)

 

But I'm not going to be using the Auxito Q16 anymore as the load resistors seems to give issues...

 

Auxito Q16 - https://www.ebay.co.uk/itm/185535671644?hash=item2b32c9ad5c:g:rqgAAOSwRtJi9mfp

[Radiogaga]

Hi

I don't mean to hijack the topic, but my issue does involve LED head light bulbs. I fitted H1 and H7 and H8 (Think its H8 fog lamps) in my Octavia mk2 2010 Greenline Diesel and when I first switch the ignition on, they all flash about 4 or 5 times then stop flashing I don't get any bulb errors on the dash, it's just the flashing when ignition is first switched on. Can anything be done to stop them flashing apart from fitting back the halogen one's. Thanks.  

[OneSlowBoi]

12 minutes ago, Radiogaga said:

Hi

I don't mean to hijack the topic, but my issue does involve LED head light bulbs. I fitted H1 and H7 and H8 (Think its H8 fog lamps) in my Octavia mk2 2010 Greenline Diesel and when I first switch the ignition on, they all flash about 4 or 5 times then stop flashing I don't get any bulb errors on the dash, it's just the flashing when ignition is first switched on. Can anything be done to stop them flashing apart from fitting back the halogen one's. Thanks.  

Hi @Radiogaga

Yes Carista does have an option to turn off cold diagnostics bulb checking only if you opt in for the beta release.

I use Android so I don't know if it applies to iPhones but I'm sure it's similar.

 

I think VCDS has the same thing in Central Electrics Long Coding but I am not sure as I don't own VCDS myself.

[OneSlowBoi]

After testing a lot of LED Bulbs I've finally done the full LED upgrade with no Canbus Errors!

 

The fog lights I've used are the Auxito M3 H8 LED Lights.

They are pretty bright and I don't have that drive battery voltage code which is great so no loud cooling fan anymore lol

 

Paid £36 for them but I think they are well worth it and I highly recommend them if you're looking at getting fog lights for Mk2 Octavia.

My cars battery is on trickle charge if you're wondering...

 

Ebay Link that I bought from - https://www.ebay.co.uk/itm/185585719053

[Radiogaga]

24 minutes ago, OneSlowBoi said:

Hi @Radiogaga

Yes Carista does have an option to turn off cold diagnostics bulb checking only if you opt in for the beta release.

I use Android so I don't know if it applies to iPhones but I'm sure it's similar.

 

I think VCDS has the same thing in Central Electrics Long Coding but I am not sure as I don't own VCDS myself.

Thank you for your reply, so that's what it's called cold diagnostics bulb checking. I will look into that I use Android and have the ELM Bluetooth adaptor.

What is the version of the beta release. 

[OneSlowBoi]

20 minutes ago, Radiogaga said:

Thank you for your reply, so that's what it's called cold diagnostics bulb checking. I will look into that I use Android and have the ELM Bluetooth adaptor.

What is the version of the beta release. 

I've used Carista V6.7 beta 3 to do it but any version should work. It's under beta settings.

I don't condone piracy but you can get it for free if you know where to look online.

[langers2k]

A 2010 Octavia will probably have a BCM so the cold diagnostic option is unlikely to be there...

 

It only applies to CECM's.

[skomaz]

I'm pretty certain cold diagnostics was there on my 2007 4x4 as I remember turning it off.  But maybe the BCM was different or model dependant?

[langers2k]

2 minutes ago, skomaz said:

I'm pretty certain cold diagnostics was there on my 2007 4x4 as I remember turning it off.  But maybe the BCM was different or model dependant?

 

A 2007 would have a CECM.

 

As I mentioned earlier in this thread:

Quote

Older cars (MK5 Golf and pre-FL MK2 Octavia) use a CECM (Central Electronics Control Module) and CCM (Comfort Control Module) to control various functions including the exterior lighting. As you've found, there is very little customisation for lighting.

 

Around 2009 (MK6 Golf and FL MK2 Octavia) the CECM/CCM were replaced by a single combined BCM (Body Control Module). As LED lighting options started being fitted, the BCM had to support LED lighting. Due to this, the lighting configuration got more customisable but wasn't well understood for quite some time, hence the infamous byte 18 issue...

 

[OneSlowBoi]

2 minutes ago, langers2k said:

A 2010 Octavia will probably have a BCM so the cold diagnostic option is unlikely to be there...

 

It only applies to CECM's.

wow, I didn't know that 😅

Interesting 🤔

[J.R.]

1 hour ago, Radiogaga said:

Hi

I don't mean to hijack the topic, but my issue does involve LED head light bulbs. I fitted H1 and H7 and H8 (Think its H8 fog lamps) in my Octavia mk2 2010 Greenline Diesel and when I first switch the ignition on, they all flash about 4 or 5 times then stop flashing I don't get any bulb errors on the dash, it's just the flashing when ignition is first switched on. Can anything be done to stop them flashing apart from fitting back the halogen one's. Thanks.  

That is interesting, if the bulbs are not LED bulbs and are the correct wattage then it sounds like the system is passing too much current or a higher test voltage.

 

I never knew my car had the system till I fitted a towbar and bypass relay, now when I switch on I can see the trailer lights flash, the small bulb test current is enough to trigger the high impedance towing relay and hence flash the trailer lights but I cannot see any illumination of the vehicle front or rear lights, to be fair I'm not usually in a position to see them when turning on the ignition but having checked when the I saw the trailer lights flash nothing was visible on the vehicle lights.

[Radiogaga]

Hi

Yes, the cold diagnostic option is not there never mind I'll just have to live with it, LED headlights are really good I have never liked driving when it is dark, but these make a big difference especially as I am getting on in years lol.