Help with P034100 Camshaft Pos. sensor.circ

[doublespeeded]

Hi all,

I trust that you guys have all been keeping well.

I’ve just undergone a very costly; complete/full engine rebuild of a 2.0T and it’s only been a hand full of days since finally getting the car back. (So far, just 280miles break-in)

I’ve found that the P034100 code comes up after an OBD scan.
I’ve cleared it before, only to see it resurface.
I’ve also replaced with a brand new OEM Camshaft pos sensor as a trial and error. But It has reappeared once again.

Obviously I need to take it back in at the earliest, but right now, i can’t help but feel upset and stressed out about it. I’m wondering the possibility of anyone may have experienced or knows more about this?

I’m definitely hoping that it’s not something sinister, like a skipped/stretched chain, which apparently is one of the causes. But again, it had all- new; timing chain kit, tensioners, pumps… the lot. :(




Sent from my iPhone using Audizine

[Smac770]

P0341 Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or Single Sensor)
Signal pattern incorrect

Not sure what "incorrect" means.

Interesting video about a basic setting where you can test the VVT operation using VCDS, etc. youtu.be/fArv2V38R08

Could be a wiring issue. Worst case scenario would be a problem with the wheel on the cam or a problem with the ECU.

If it was a chain issue, there would be a correlation error P0016 or such, not a P0341 alone.

I would log adjustment actual vs adjustment specified and see if they are tracking together or if there is a range issue with the actual. Low oil level, poor oil pressure, what did they do about the cam bridge screen?

[doublespeeded]

P0341 Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or Single Sensor)
Signal pattern incorrect

Not sure what "incorrect" means.

Interesting video about a basic setting where you can test the VVT operation using VCDS, etc. youtu.be/fArv2V38R08

Could be a wiring issue. Worst case scenario would be a problem with the wheel on the cam or a problem with the ECU.

If it was a chain issue, there would be a correlation error P0016 or such, not a P0341 alone.

I would log adjustment actual vs adjustment specified and see if they are tracking together or if there is a range issue with the actual. Low oil level, poor oil pressure, what did they do about the cam bridge screen?

Heya Smac770,

Thank you for coming to my aid

I will be taking it back to the workshop late this week and will definitely mention these suggestions to try assist with the diagnostics.

Sorry for the trouble, but could you kindly provide a bit more info/guidance on the following?:

"I would log adjustment actual vs adjustment specified and see if they are tracking together or if there is a range issue with the actual. Low oil level, poor oil pressure, what did they do about the cam bridge screen?'

I don't really understand that side of things, but if you can provide a bit more info, I will ensure I get some answers at the workshop.

with regards to oil, since its only 400Miles break-in, the oil level has dropped to 3/4... which I imagine slight consumption would be expected due to brand new pistons & honing

So the only other two Faults that appear are:

1.) Engine - Catalyst System, Bank1 p042000 - This is due to currently running the stock tune/file for now with a Test-pipe.
As I've had an incident with the previous off-the-shelf k04 tune that was likely responsible for blowing one of the pistons.

2.) General Electrics - Static Current p02256 - this appeared a while ago, i believe the alternator may be playing-up or on its way out. I've seen the battery voltage intermittently whilst driving reaching 14.9v.

Both should be unrelated and shouldn't signal a Camshaft positioning sensor fault??

This wouldn't be part of the new OEM File learning itself?

or, cant be OEM file + K04 tune, signaling that sensor? (it definitely doesn't seem to run the greatest, being un-tuned)

What i find really puzzling is when I cleared the faults, replaced the camshaft positioning sensor. The very first drive, the fault did come up (which gave me the shits!).
But when I cleared it once more....it hasn't actually hasn't come back in days. (weird)

[Smac770]

P0420 is not related.

02256 (it's an Audi identifier, not a OBD code), are you sure that's coming from the J519 and not the J533? 02256 is normally seen from the J533, as the BEM is a subcomponent of the J533. Regardless, that's about excess current draw after the car is locked. E.g., https://www.audiworld.com/forums/a4-.../#post25499063 Won't be related to your P0341.

The expected pattern is evaluated by the ECM. If you have a tune, it very well could impact the management of the N205 and cause the result to be different than the ECM check routines are expecting. That's why I was saying log actual vs specified and see if there's a detected difference.

https://www.audizine.com/forum/showt...1#post13008839

So that shows you the two values in VCDS. I logged them and some other values and put the log in excel and graphed them:
https://www.audizine.com/forum/showt...1#post14267976
https://www.audizine.com/forum/showt...1#post14269072

The pictures are loaded, but you can see the specified and actual move together, with a little lag by actual as expected. This is what you're looking for. Is actual able to go the full range with specified and is it tracking pretty close.

There's also that adjustment activation duty cycle %. That's the signal from the ECM to activate the N205, which causes the VVT adjustment from the rest position (which the cam sensor should relay as +28° relative to crank timing) to whatever the specified angle is.

Sometimes faults take two clears to really go away. If the issue has stayed away, I'd forget it till it comes back.