It isnt recognised, says unknown device

It isnt recognised, says unknown device

Could well be a driver problem. Did the drivers come on a disk? I had a cheap cable which came with outdated drivers that wouldn't work.

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Drivers were on the disk, but I also downloaded them from t`net. In device manager it says unknown device, and if you ask it to download drivers it says they are correct. Getting distinctly fed up with this issue now! Very grateful for any help, but looks like its going to have to go to another garage with diagnostics after all, even though there are no symptoms, I worry I might be doing damage 

You could see if there is someone on here with VCDS near you who could scan the car for you. Have a look at the list/map thread in the diagnostics forum.

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Great, I`ve PM`ed someone relatively close to me. Didnt even know that forum existed, many thanks

You need these drivers:

 

http://www.ftdichip.com/FTDrivers.htm

Thanks, but not sure what to do with it. Cant see a download option

You need these drivers:

http://www.ftdichip.com/FTDrivers.htm

Probably...

Most usb-serial converters (which is what a cheap KKL cable essentially is) use FTDI chipsets but not all.

Using the vendor and device IDs from windows device manager you can confirm exactly which chipset it is and then find the right drivers for you version of windows.

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Thanks, but not sure what to do with it. Cant see a download option

 

http://www.ftdichip.com/Drivers/VCP.htm

I'm rolling the dice Trundle, all the VCDS compatible cables tend to use FTDI because they're so cheap.

Not helped at all, sorry

Not helped at all, sorry

 

Sounds like they've sent you a faulty lead.

Sounds like they've sent you a faulty lead.

There have been counterfeit ftdi chipsets doing the rounds which were borked (intentionally or accidentally) by driver updates.

But it does seem likely that in this case it would seem most likely the cable is duff.

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Address 01: Engine        Labels: 036-906-034-APE.lbl
   Part No: 036 906 034 BK
   Component:  MARELLI 4LV       3700  
   Coding: 00031
   Shop #: WSC 13765 
   VCID: 5CB7B83ACC655BC1528-4B32
   TMBND46Y923428004     SKZ7Z0A1164530

1 Fault Found:
16804 - Catalyst System; Bank 1
            P0420 - 35-00 - Efficiency Below Threshold

 

This issue persists. Steve was kind enough to read my fault and reset it. Obviously the EML came on again shortly after, with above legend. I returned the car to the garage as they replaced the cat and its still under warranty, they now have a diagnostic lead, and they say its the first cat (as in bank one, above)that has now failed, and the one they fitted is fine. This means there are two cats? Can anyone confirm this please, or are they having a laugh, never heard of a car having two catalytic converters, but then I`m no mechanic!

They're having a laugh.

 

Bank 1 refers to the cylinder block not the cat, Bank 2 would be the other half of a 'V' engine, not applicable in your case.

 

Tell them to replace the post-cat lambda probe if they've actually done the cat.

There are two cats. Pre-cat integrated with the exhaust manifold, post cat towards the rear of the front exhaust section, looking like a very fat baked-bean can.

 

Quite a common arrangement since ??? because the one nearest the engine warms up very fast so deals with cold-start emissions better than a single cat further from the engine.

There are two cats. Pre-cat integrated with the exhaust manifold, post cat towards the rear of the front exhaust section, looking like a very fat baked-bean can.

 

Quite a common arrangement since ??? because the one nearest the engine warms up very fast so deals with cold-start emissions better than a single cat further from the engine.

 

Nope, mine has the catalyst as part of the exhaust system and a plain old exhaust manifold, later models have the mani-cat but no cat in the exhaust system.

 

Two entirely different and separate solutions.

Huh?

Are you saying your exhaust manifold looks like item 1 on this page, rather than 1A?

 

http://www.partscats.info/skoda/en/?i=cat_vag_models&brand=sk&number=42&set=44&ein=2001&f=225&hauptgr=1234567890&hg=2&grf=025310194&bf=25320&hgug=253&ug=53&parent_id=45832

 

According to that page, only BKY engine code doesn't have the manicat??

You've got me doubting my own sanity now.

 

Edit: I just went out and looked, I have got the mani-cat, I'm going nuts.

Edited 23 March, 201511 yr by sepulchrave

In that case it seems we do have two cats and the OP has not had the mani-cat replaced at a guess.

 

VCDS still uses Bank 1 to refer to the cylinder block of an inline engine, so that part is still BS.

Not sure that I would rely on the garage's diagnosis even so. Seems convenient (for them) to pick another pricey bit to replace? If the cat which they replaced first didn't fix it, was it actually faulty?

 

I'm not too sure where the oxygen sensors are in relation to the two cats, and so can't really suggest the best diagnostic logic.  

 

Having just looked under my Polo (BBY engine), predictably the two oxygen sensors are before and after the combination of both cats, so not obvious (to me) how one would determine which cat if either is underperforming.

I say if either, because it could be difficult to disentangle oxygen sensor performance and cat performance. What you could maybe do, with access to VCDS, is to look at the signals coming from each oxygen sensor? Not something I know how to do, but possible, I think.  May be able to spot something amiss with one or the other, or to rule them out as the problem.

 

If you can't get down and dirty with VCDS, cheapest thing to try, by a fair bit I should think, is sepulchrave's suggestion of replacing the post-cat oxygen sensor, the one under the front seat area of the car. If you know your engine code and year of car, I can probably find the appropriate part number for you to seek.

Access doesn't exactly look peachy, but in your case, that sensor has been recently re-fitted to a new cat pipe, so corrosion / seized threads should be less of an issue than it might be with this one: