D4 VEA 'check engine' light / EGR fault thread

[007]

Originally Posted by RoyMacDonald

I heard on the news an emission test company say that the software VW used cut emissions by 10%, in their tests. The difference between euro 5 and euro 6.

There is all sorts bouncing around Roy

I heard 11m VW cars were involved and they reduce the dosing by a factor of 40 times when it is not on test

[NigelDay]

Originally Posted by RoyMacDonald

Don't forget the majority of the tax comes from the use of fuel so an eco car will still give a tax advantage.

I have a Dutch friend who runs an (3-year old) XC90 D5 and a V60 T6 hybrid.
He was aghast when I told him my annual VED was only £30.
He pays around £2000 for his XC90.
Diesel is, however, much cheaper. So, depending upon how much mileage you do, high 'VED' might not be quite as bad. I'll do the maths later and report back.

[craigv60]

Originally Posted by RoyMacDonald

I heard on the news an emission test company say that the software VW used cut emissions by 10%, in their tests. The difference between euro 5 and euro 6.

The software for the 'test cheat' actually cut NOx emissions by over 10X (i.e. 1000%), not 10%

The agency testing the cars only spotted it because they were testing a BMW X5 alongside the Passat and Jetta. The BMW gave higher NOx emissions on the road compared with the test conditions, but the variance between test and real-world conditions was what the testers expected.

However, the Passat and Jetta produced up to 10x their 'official' NOx rating on the road. The testers assumed there was something wrong with the cars, so put them on a rolling road under test conditions. But the cars passed the test.

Basically, the VW cheat software manipulates the AdBlue urea-based system so it only hits the NOx target during an emissions test.

As far as I know, BMW don't use AdBlue to reduce NOx, but do it like Volvo does with EGR cooling etc.

[apsel]

I also read that to overcome the reticence of USA customers to buy Diesels VW includes top ups of Adblue for free and state it is normally only required at every service interval.

Clearly if a lot more Adblue is required to run at the level needed for the tests they were looking at a big bill and also inconvenience to the customers in having to get it refilled!

[007]

[GMcL]

Originally Posted by NigelDay

I have a Dutch friend who runs an (3-year old) XC90 D5 and a V60 T6 hybrid.
He was aghast when I told him my annual VED was only £30.
He pays around £2000 for his XC90.
Diesel is, however, much cheaper. So, depending upon how much mileage you do, high 'VED' might not be quite as bad. I'll do the maths later and report back.

Don't forget the Dutch VED system takes into account vehicle weight, engine size , number of driven wheels as well as fuel type and emissions. SUVs are not big sellers in NL.

[apsel]

The picture of the VW scam is getting clearer and it seems cars both with and without the AdBlue (SCR) kit have the test defeating software in them. From what I read now, as the facts leak out, the worst offenders are those without AdBlue which rely simply on EGR, i.e. similar to Volvo. Apparently it is very difficult to pass the latest US tests using EGR alone without wrecking the performance and fuel economy as a lot of EGR needs to be used to get rid of the NOx. I guess the EURO 6 tests are a similar challenge. This partly explains why Volvo are struggling to get this right!

[007]

Originally Posted by apsel

The picture of the VW scam is getting clearer and it seems cars both with and without the AdBlue (SCR) kit have the test defeating software in them. From what I read now, as the facts leak out, the worst offenders are those without AdBlue which rely simply on EGR, i.e. similar to Volvo. Apparently it is very difficult to pass the latest US tests using EGR alone without wrecking the performance and fuel economy as a lot of EGR needs to be used to get rid of the NOx. I guess the EURO 6 tests are a similar challenge. This partly explains why Volvo are struggling to get this right!

Head Nail hit on the !

[The Tinkerer]

Interestingly, BMW is being dragged into this now: http://www.theguardian.com/business/...ons-volkswagen

[RoyMacDonald]

Originally Posted by apsel

The picture of the VW scam is getting clearer and it seems cars both with and without the AdBlue (SCR) kit have the test defeating software in them. From what I read now, as the facts leak out, the worst offenders are those without AdBlue which rely simply on EGR, i.e. similar to Volvo. Apparently it is very difficult to pass the latest US tests using EGR alone without wrecking the performance and fuel economy as a lot of EGR needs to be used to get rid of the NOx. I guess the EURO 6 tests are a similar challenge. This partly explains why Volvo are struggling to get this right!

On the news today VW said only the 1.6 and 2 litre engines have the "cheat" software.