Hi Folks,

So having had the front transfer box go, tailgate switch and rear wiper motor go, at the weekend I suddenly got a 'system engine fault' message and 'special programs off' message.
The garage have had a look and reckon it needs a new throttle body.
Now, I don't have the error codes so I can't give you any more clues but can anyone tell me if this is likely?
I've done some searching on here and I see the throttle body mentioned a few times. I've no idea what's involved with either cleaning it or replacing it myself. The garage have quoted £341 which depresses me greatly.

Stuart

The throttle body is about £100 genuine parts,I replaced mine about a month ago and it's easy enough.there are 3 torx screws,a rubber hose and I think 2 electrical connections to remove and that's it job done,obviously refitting is the reverse.

Thanks Paul1966. That's good to know.

Stuart

Replaced throttle body on mine yesterday £102 from Duckworthparts.co.uk email danroberts@duckworthlandrover.co.uk
mine is 4 years old 60000 miles.
No fault codes just a loud clicking niose after engine turned off. plus the engine jolted to a stop instead of shutting down smoothly.
Takes about an hour to change it, you will need a torx socket set.

Roly

Thanks Roly,

Roly and Paul, I have 2 questions:

1) Er....can either of you describe where the throttle body is?
2) Does the fact I have to ask question 1 suggest that I'd better let someone else do it as I don't know what
I'm doing?

There is a suggestion (from someone reading the error codes) that the EGR is stuck. Is that an easy job to fix?
(easy as in easy for an idiot like me).

Stuart

Hi Stooby,

I changed mine a few months ago and there was a good guide on here, do a search for it.

Cheers

D'oh! I had tried search and missed it first time
Round. Thanks for the pointer.

Stooby

Throttle body replaced today after starting to click on shut down £107 genuine part took about an hour to fit in all. Just to let you know that the back two torque screws dont need removing all the way out for the throttle body to be removed .

My throttle body failed recently, fluttering noise after shutdown but no messages, was a bit lumpy on shutdown otherwise no other symptoms. If it still has the normal high pitched whine from the front after switching off its not the throttle body.

Sorry, just noticed the age of the original post.

A landrover service manager told me that if your throttle body fails then the best thing (to get you home) is to disconnect the plug at the top of the unit. This ensures that the flap stays open, you will get some warnings on the engine management light as the engine will be running a bit lean but it will be driveable.

Quote:

A landrover service manager told me ...... disconnect the plug.......This ensures that the flap stays open...... the engine will be running a bit lean

And that was a LR service manager ???

I hope the mechanics working under him are more knowlegeable

Indeed....

A diesel engine is by default a "lean" running engine.
The air flow is an open one, without any restrictions, and the RPM is varied only by the injected fuel quantity.

In FL2's diesel engine case, the throttle body is having only the following functions:
1. Helps stopping the engine more effectively on shutdown by blocking the intake air.
1.1. Stops the engine in case of diesel oil runaway.
2. Helps regenerating the DPF, if you have one, by restricting the air flow ONLY when regenerating, increasing in this way the EGT.

If it's any consolation he now works for a non landrover dealer I believe. However in his defence it was a get you home measure.

Please, don't take it personally...
Besides the confusion between gasoline and diesel engines, also it can't be considered a real "get you home" measure because, as shown in many cases, if the toothed wheels inside get "shaved", the motor can't move the flap and, if the flap remains closed, in no way disconnecting the wires can solve the problem... Only dismantling the thing can solve it...