Are 2004 CDTis OBD compliant?

CDTi · 30th July 2008, 10:23

Anyone know if the diesels from 2004 onwards are definitely OBD (or is it EOBD) compliant?

AFAIK all diesels made since 2004 are meant to be, but was this ever confirmed with our cars?

pondweed · 30th July 2008, 11:05

I think Ron said something about "if you have the second temp sensor" in the position near the EGR.....?
or was that for some other thing?

SteveWaller · 30th July 2008, 11:21

Mine is so I think the answer is yes.

Roverron · 30th July 2008, 11:32

Quote:

Originally Posted by pondweed

I think Ron said something about "if you have the second temp sensor" in the position near the EGR.....?
or was that for some other thing?

In theory all 2004my should be.

Ti Rich's 2003 ZT was and his did have the second IAT in the intake duct, hence I speculated that all that had this, were 2004my engines with OBD compliant ecu firmware. But don't hold me to it!

Ron

CDTi · 30th July 2008, 11:37

Quote:

Originally Posted by Roverron

In theory all 2004my should be.

Ti Rich's 2003 ZT was and his did have the second IAT in the intake duct, hence I speculated that all that had this, were 2004my engines with OBD compliant ecu firmware. But don't hold me to it!

Ron

Thanks Ron.

I must have a look for the second sensor. Where abouts is it?

Roverron · 30th July 2008, 14:26

Quote:

Originally Posted by CDTi

Thanks Ron.

I must have a look for the second sensor. Where abouts is it?

Its in the air intake hose a few inches from the egr valve inlet on the manifold.

Ron

CDTi · 30th July 2008, 14:37

The only sensor on my inlet hose is the turbo boost temp sensor:

Roverron · 30th July 2008, 14:51

Quote:

Originally Posted by CDTi

The only sensor on my inlet hose is the turbo boost temp sensor:

That's the one.

Its only fitted to 2004 and later vehicles (Euro 4 emissions standard I suppose), hence yours should be OBD2 compliant.

Earlier ones (to Euro 3?) just have the IAT that is built into the maf sensor which fails to take into account the heating effect of the turbo and cooling efficiency of the intercooler so the ecu can't accurately calculate the actual mass of air entering the inlet manifold!

Ron

CDTi · 30th July 2008, 15:00

Quote:

Originally Posted by Roverron

That's the one.

Its only fitted to 2004 and later vehicles (Euro 4 emissions standard I suppose), hence yours should be OBD2 compliant.

Earlier ones (to Euro 3?) just have the IAT that is built into the maf sensor which fails to take into account the heating effect of the turbo and cooling efficiency of the intercooler so the ecu can't accurately calculate the actual mass of air entering the inlet manifold!

Ron

Thanks Ron

. Looks like an OBD scanner should work OK on my motor :lol:.

Ti Rich · 2nd August 2008, 08:03

Just for the record mine was a Jan 2004 build, not 2003.

30th July 2008, 10:23	#1
CDTi This is my second home No longer in the MGR club Join Date: Nov 2006 Location: Tipperary Posts: 3,933 Thanks: 35 Thanked 51 Times in 35 Posts	Are 2004 CDTis OBD compliant? Anyone know if the diesels from 2004 onwards are definitely OBD (or is it EOBD) compliant? AFAIK all diesels made since 2004 are meant to be, but was this ever confirmed with our cars?

2nd August 2008, 08:03	#10
Ti Rich Gets stuck in Audi A6 TDi 175 Join Date: Nov 2006 Location: Dudley Posts: 572 Thanks: 0 Thanked 3 Times in 2 Posts	Just for the record mine was a Jan 2004 build, not 2003. __________________ CD(Ti Rich) Audi A6 C7 TDI - zzzzzzzzzzzzzz, so boring!! BMW 330d M-Sport - Gone and missed ZT CDTi, gone but not forgotten!

30th July 2008, 11:05	#2
pondweed This is my second home Waiter, Waiter! I seem to have a Roomster in my drive... Join Date: Nov 2006 Location: Sussex Posts: 3,268 Thanks: 0 Thanked 1 Time in 1 Post	I think Ron said something about "if you have the second temp sensor" in the position near the EGR.....? or was that for some other thing?

30th July 2008, 11:21	#3
SteveWaller Avid contributor Rover 75 cdti Contemporary SE Join Date: Aug 2007 Location: Northern Ireland Posts: 199 Thanks: 1 Thanked 1 Time in 1 Post	Mine is so I think the answer is yes.

30th July 2008, 14:37	#7
CDTi This is my second home No longer in the MGR club Join Date: Nov 2006 Location: Tipperary Posts: 3,933 Thanks: 35 Thanked 51 Times in 35 Posts	The only sensor on my inlet hose is the turbo boost temp sensor: