today while driving the "emissions workshop" with the symbol came on. so went to the dealer and we got two faults. my car sometimes goes to limp mode too..

1.control module for instrument cluster: Missing signal for oil level/temperature

U1019-000--

fault frequency:210

2. Boost pressure Regulation:Limit exceeded(overboost condition)

0234-000--

fault frequency:1

the dealer just deleted the fault codes and asked to check if they come again

Edited 23 December, 201114 yr by josef9177

its standard practice to clear them and see if they come back again as they can be logged erroneously.

i woouldnt worry about either of those unless they come back a second time.

overboost fault has come twice before and deleted

Is your car remapped?

1.control module for instrument cluster: Missing signal for oil level/temperature

U1019-000--

fault frequency:210

I had that first one pop up after a dealer updated my engine ECU software and I think its a bug in the updated software rather than a physical fault with the car. I would clear it and every single time I restarted the engine it would come back. This never happened until the dealer software update. After a bit of searching I found someone with an Audi A3 TDi who had this code all the time after upgrading his instrument cluster. What he did was to change the instrument cluster coding with VCDS so that his instrument panel wasn't looking for an oil temp sensor on the engine (which his car didn't have). That stopped it instantly on his car and it did on mine too.

Unless you have Maxidot that shows oil temp and have suddenly found your oil temp display doesn't work anymore, I think this could be the same problem - ie your engine doesn't have an oil temp sensor but your instrument panel thinks it should have and flags a fault when it can't find a signal from one.

This fault merely logs a code though, it won't actually bring your emissions workshop warning on or make the car go into limp home mode. The cause of the emissions workshop warning & limp home is very likely the second fault and I would ignore the first one. The second code may be the vanes on the turbo sticking a bit and causing an occasional overboost. This would cause the car to go into limp home mode to protect the engine from excessive turbo boost. Cleaning the turbo would possibly help.

By the way, 'fault frequency' means how many times the particular fault has happened, so the second fault has occurred only once since the codes were last cleared. The instrument panel one has happened 210 times, which fits with what mine was doing, ie logging the fault every single time I started the engine. Not a cause for concern in itself, but I found it annoying on mine which is why I changed the setting in VCDS to stop it.

Over boost sounds very much like a stuck VNT mech on the turbo.

Is your car remapped?

no its a stock car

I had that first one pop up after a dealer updated my engine ECU software and I think its a bug in the updated software rather than a physical fault with the car. I would clear it and every single time I restarted the engine it would come back. This never happened until the dealer software update. After a bit of searching I found someone with an Audi A3 TDi who had this code all the time after upgrading his instrument cluster. What he did was to change the instrument cluster coding with VCDS so that his instrument panel wasn't looking for an oil temp sensor on the engine (which his car didn't have). That stopped it instantly on his car and it did on mine too.

Unless you have Maxidot that shows oil temp and have suddenly found your oil temp display doesn't work anymore, I think this could be the same problem - ie your engine doesn't have an oil temp sensor but your instrument panel thinks it should have and flags a fault when it can't find a signal from one.

This fault merely logs a code though, it won't actually bring your emissions workshop warning on or make the car go into limp home mode. The cause of the emissions workshop warning & limp home is very likely the second fault and I would ignore the first one. The second code may be the vanes on the turbo sticking a bit and causing an occasional overboost. This would cause the car to go into limp home mode to protect the engine from excessive turbo boost. Cleaning the turbo would possibly help.

By the way, 'fault frequency' means how many times the particular fault has happened, so the second fault has occurred only once since the codes were last cleared. The instrument panel one has happened 210 times, which fits with what mine was doing, ie logging the fault every single time I started the engine. Not a cause for concern in itself, but I found it annoying on mine which is why I changed the setting in VCDS to stop it.

nick that's a lot of info much appreciated for the effort thanks

but my cars software was never updated and it seems the dealer has updated it accidently maybe? how do u change the code with vcds for the instrument cluster looking for oil temp? but one thing i dont get is the instrument panel has logged a fault 210 times and why it dint pop up earlier? yeah may be the regular overboost made it pop up now but hows it connected to emmisions workshop....ehhh confusion

yes i will have to go to the dealer and do a turbo clean by removing the turbo or is there any other way to clean without taking off the turbo? no innotec turbo cleaner available in india.

the car goes to limp mode only just after the startup. ie after engine is warmed up it wont go limp mode ...from my workplace there is an incline so everytime i go that uphill the car goes limp mode...but if i go light on the throttle on that incline it doesnt go limping. after the engine is warmed up properly it wont go limp mode even we push it hard

Edited 24 December, 201114 yr by josef9177

Its been a while since I did this, but this page mentions how to change the setting for the cluster but on a VW Golf;

http://forums.subdriven.com/showthread.php?4765561-VW-Golf-5-TDI-2005-Engine-scan-malfunction

If it has never had a software update as far as you know, it may be a genuine fault and perhaps worth investigating further. I could say with reasonable certainty it was the update that caused it on mine as if I worked back the approximate number of engine starts from the fault frequency number it came back to the week the car had gone in for the update. Also I had scanned the car myself the week before the update and there were no fault codes stored at all at that point.

It could be that your car has always had this minor issue right from new, but as it wont cause limp home mode or flag up a warning on its own you would never have known about it until the second fault developed and you had the car scanned.

"Emissions Workshop" is really just the equivalent of the engine management light coming on an a petrol engine. It doesn't necessarily have to have anything directly to do with emissions as such, it means there's a fault somewhere with the fuel or air systems of the engine, or in your case the turbo.

I have never personally cleaned a turbo due to this problem but it should be possible with the turbo removed from the car. I have known wastegate faults on older type turbos be sensitive to temperature so its quite possible the VNT mechanism on yours has a temperature dependent fault - ie it only sticks when cold

Quite likely when you drive up the incline from work and accelerate with a cold engine the turbo vanes stick slightly generating slightly too much boost, the MAP sensor detects this and the ECU puts the engine into limp home. If you do it with less acceleration the turbo vanes perhaps don't get to the position where they stick so its fine. By the time the engine & turbo have warmed up the turbo vanes have freed off enough so you can give it as much acceleration as you like and the problem doesn't show.

nick ur a genius... yes i will have the instrument cluster value changed to 0 and get the turbo cleaned and see wht happens..will update

thanks

joseph