Exhaust gas warning lamp

**TDIESEL** · 02-04-2008, 05:46 PM

Hi all,

My exhaust gas warning lamp has lit up on the way home tonight (MKV TDI 2.0L), this has happened once before a few months ago but cleared itself overnight. This happen to anyone else here, if so what is the usual cause and is it anything major to worry about?. I will be ringing dealer in the morning to get it booked in for them to look at. A quick read of the owners handbook seems to point at a possible fault with some kind of exhaust probe?

**Spoddy** · 02-04-2008, 07:23 PM

I am assuming your car is an 08 spec as they come with a DPF (Diesel Particulate Filter)

Do a search on DPF as it is probably related to that. Diesel Particulate Filters have been a pretty hot topic as they seem to clog up. There is s clearing process where you have to drive for about 15-20 minutes above 2000rpm.

It should all be in your manual as well.

**Mischa** · 02-04-2008, 11:43 PM

harr harr harr

is it a gt sport? if not then you dont have the dpf. and the dpf warning is separate to the other one i think

**Spoddy** · 03-04-2008, 11:48 AM

If not a DPF it would then have to be the catalytic converter?

**Mischa** · 03-04-2008, 03:49 PM

faulty sensor?

**TDIESEL** · 03-04-2008, 05:17 PM

Forgot to mention I have one of those tuning box thingy's installed, took it out last night and light came on again this morning but didn't come on this arvo after work. I now remember doing this last time it happened as well and waited a few weeks before i put the tuning box back in so buggered if I know why it's taken 3 or 4 months to happen again.

**niss_man** · 03-06-2008, 04:52 PM

I had the same thing happen to mt brand new 2 tdi comfortline with only 750km on the clock (still the first tank of diesel). The exhaust gas light came on and stayed on with no apparent changes to the way the car drove. It ended up being a sensor unrelated to the exhaust. It had a faulty MAF (air sensor,intake) which was replaced and now the light has gone out. I did notice that before the air sensor was replaced I could hear the turbo and blowoff valve working more easily. Now I can hardly hear the turbo or bov at all. Driving with the new sensor fitted I could feel slighty more torque down low in the rev range as well. It seems that the sensor was probably faulty from new.