Hi, can anyone tell me what the left hose (shown here) on the exhaust pressure sensor, should be attached to. 

I've been having all sorts of problems with my 2011 1.2 tdi greenline. Namely engine fault light, followed by the DPF light on. 

I've also pulled fault codes today. 

P2453

P2463 

 

As an aside the dealership has told me that I need to fit a new turbocharger and that the DPF may need also changing. 

 

Any help would be great. 

 

Paul

Incidentally the dealership also did the EGR valve in the last 12 months at around £1200. 

Probably intentionally not connected. Appears to be no sign of any hose clip having been on that loose end?

Many engines leave that port open to atmosphere.

Thanks Pete, so it doesn't actually 'need' to be connected to anything?

 

There is actually signs of a hose clip having been crimped around it at some point in its life, but for the life of me, I can't seem to find a place where it would attach to. It's not a car I know well at all, having been maintained by a garage for my wife, who owns it. 

 

Begs the question, what is the point in it on this model. 

 

 

Is that the fuel filter mounted just below it?

If so, that seems a bit scary since those pressure sensors have been known to get so hot that they melt.

 

I don't know much about the unconnected hose, but I think it would be connected downstream of the DPF if it were connected, which ought to be close to atmospheric pressure as long as the remaining exhaust parts aren't blocked.

 

Having it unconnected just means that the pressure upstream of the DPF is compared to atmospheric pressure via the open hose.

 

The sensors do fail quite often, so that may be what the fault code is telling you.

I don't know what else to suggest except perhaps to make sure the wiring to it looks undamaged.

Edited 25 September, 20241 yr by Breezy_Pete

Thanks for the tip. I could get a new one. Didn't know about the getting hot, but it's bracket actually clips to the side housing of the fuel filter so it would actually sit directly above. 

 

Getting a bit fed up with this car. Like I said, I'm the 3 years we've owned it, we've done EGR valve, engine vacuum pump, turbo actuator, brake calipers, and now they are suggesting the turbo and DPF. They are saying anything from £1500-3000. I really don't have the stomach for that but I've got a reconditioned turbo sitting on the shelf and unsure whether to start the job(s) or bail out. Annoying thing is the dealer said that the overall car is in good condition. It's done 140k. 

 

 

Might I suggest you start to take it to an independent VAG specialist and not the dealer? I get the impression they see you as an easy mark.