View Full Version : My Laguna won't work

21st May 2005, 11:54
I am a desperate man.

I have a Renault Laguna II, 1.8ltr petrol. Yesterday, on starting it up, I had an "engine management computer" caption on the dashboard, and the engine sat revving between 2,000 and 2,400 rpm. No inputs on the accelerator had any effect.

This is the fifth time in two years of owning the vehicle that this has happened. It has been diagnosed as a faulty throttle body, (replaced three times now), and last time as too much silicon sealant where the wirnig from the EMC enters the throttle body sensor (or something like that).

It is sitting at my local Renault dealer's as we speak, and I don't want them to fob me off by telling me it's another throttle body.

Has anyone had the same, or does anyone have any ideas as to what it might be?

21st May 2005, 12:58
A laguna you say, Hmmmmm


21st May 2005, 13:26
That's easy!!!

It's French.....Probably on strike !!..:)


21st May 2005, 13:32
Oh great - another car thread!! :=

There are now 7 current threads about cars and/or driving.

Enough, already. :{

21st May 2005, 13:42
Sorry, tart, but it nearly made me late for work, and I love my job soooo much.....

Lon More
21st May 2005, 13:42
Renault electronics seem to be as egocentric as the Frogs themselves.
My Avantime occasionally decides not to play at all and I have to find the spare key to unlock it. Then it all works OK.
Peugeot Partner diesel pre-heater sometimes comes on when engine is at operating temp.
A colleague was almost driven crazy by his constantly telling him that a door was open.

21st May 2005, 13:45
No racist comments please Lon.....i got slated for this a while ago.


21st May 2005, 14:19
I had one of them lagunas once, the moral of that story is get rid of the f**king thing, more trouble than they are worth.

21st May 2005, 14:19
Renault electronics seem to be as egocentric as the Frogs themselves. Tell Mercedes ;)

gas path
21st May 2005, 14:24
Maybe its a Renault thing, my neighbours Megane spends most of its life in the dealers.
:mad: :mad:
.............and last time as too much silicon sealant where the wirnig from the EMC........... Silicon sealant will destroy the Lambda sensor quite effectively if even the tiniest qty gets burnt during the combustion process, and that in turn could lead to a wrecked catalytic converter. :E

21st May 2005, 14:59
the Lambda sensor

Isn't that a dodgy Brazilian dance?

21st May 2005, 15:04
oooh lambda sensor, dads having some trouble with his Citroen Xsara at the moment with that thing!!

Dealer - will probably fob you off, ifs its not under warranty I would take it to an independant place - someone that specialises in Renault!

21st May 2005, 15:52
Try Honesr John's (http://www.honestjohn.co.uk) website or email him.


21st May 2005, 19:04
Engine management light plus slow speed is probably car in 'get you home mode' - many cars, if they detect an electronics fault, will put the car into a limited performance mode to prevent engine damage but allow you to continue a journey.

This slow running may be totally unrelated to the actual fault.

Independent repairers with decent electronic diags can plug in and tell you what the problem is. If it's lambda sensors, expect there to be problems diagnosing which it is (there may be up to 4) and you may have to change them all. In some cars these are 150 each (Toyotas are particularly bad).

Electrics/plugs: expect to change leads, coil pack & plugs, perhaps 150.

There are many other things it could be but those two are most common.

Independent will be cheaper than dealer if you find a good one. I'd suggest that less than 1 in 10 is that good, so be careful.

I manage an independent garage.....a good one....


22nd May 2005, 06:14
the Lambda sensor
In your case, Jerricho, the "lamb......durr" sensor and silicon lubricant. :rolleyes:

22nd May 2005, 14:50
You forgot the mint sauce Acbus :p

Loose rivets
22nd May 2005, 18:53
Are you still trying to find an answer?

Does your car have a diagnostics mode.? For instance, on my GM offering, you enter diags by pressing heater ON + temp up. Then page through the output from each of the five computers in turn. Write down the codes, and look them up on one forum or another.(Google)..or a friendly dealer.

Here, AutoZone will decode most cars for a small fee. Can't quite see Halfords doing this, but in larger towns, who knows.

Often, rubber covered plugs will leak, and all that is required is the cleaning and application of silicone / WD 40

The removal and cleaning of some types of sensor, will sometimes do the trick.

22nd May 2005, 19:32
Buy yourself a pre nineties car where no electronics messed you about - my merc ain't had any electrics problems and I'm keeping it. When ahead, stay ahead.:ok:

23rd May 2005, 07:49
What was the advert for Lagunas again? "Come fly with me, come fly with me........"
Maybe that's what you should do with it.

Electrical management systems are a disaster in any brand when they start to go wrong. Garages never seem to be able to find the faults......I had a Montego GT at one point which I sold as none of the Rover garages seem to be able to find out why the
:mad: thing went through engine cut outs when driving on motorways!

Present vehicle exhibits a christmas trees like dashboard display regularly without any logic as to why and without any impact sofar.