Thread: D3 Fault help needed

My '07 V6 D3 did this (and displayed other catastrophic "faults" ie engine failure) in its fourth year. After weeks of trial and error it turned out to be a faulty wiring loom in the engine bay. Said loom had to be imported from the UK.

As a temporary fix for the suspension lowering, get the vehicle up to normal height then remove the main (20A) suspension system fuse from the engine bay fuse box. Then to prevent incessant warning messages, remove the 5A suspension system fuse from the interior fuse panel that's located behind the passenger glove compartment.

For the gearbox fault, try using sport mode for the hills.

Check the wiring harness behind the front left wheel in case its come away from its retaining clip and has been rubbed by the tyre. If insulation has rubbed through, the wheel speed sensor may have intermitant faults that will trigger your faults.

Thanks for the ideas the harness is good will see how it goes tomorrow when it has cooled down and see if we can get to Armidale.


bigmac

My D3 started doing that last year.

It turned out to be a faulty high pressure fuel pump - when you put your foot down up a hill, it cannot keep the flow rate and pressure high enough.

Need to get faults checked, but could be as simple as fuel filter blocked if only happening when extra fuel needed.
Also need to check brake light globes and brake light switch as these cause all sorts of problems.
Good Luck

Hi,

I had the same issue in our 2007 D3. The dealer had no Idea - "we have cleared the faults see how it goes". Next time they changed the fuel filter, still no good. I did heaps of reading on this site and disco3.co.uk . I asked the dealer to change the HP fuel pump. This fixed the problem. Over the next two years the fault has only returned twice, both times towing up a long hill.
The extended warranty covered the cost of the pump.
Good luck
Regards
Andrew

thanks guys for the help got to Tamworth and the dealer there was very helpful and was able to look at it on new years eve and cleared all the faults. had no problems so far at Finley should make Halls Gap tomorrow. so if you see a red D3 with NEV 024 on the plates don't be afraid to wave.


Bigmac