Renault Laguna 2 - 1.8 16v Throttle Problem*FIXED* - Page 4 - Renault Forums :: Independent Renault forum

LinkBack Thread Tools Display Modes
post #16 of 129 (permalink) Old 26th October 2007
Junior Member
trevstamf's Avatar
Join Date: Aug 2007
Posts: 5
Nominated 0 Times in 1 Post
Nominated TOTW/F/M Award(s): 1
Thanks: 0
Thanked 8 Times in 2 Posts
Repaired at last

well what can i say....................

After months of barmy antics , visits to the dealers , lots of cash spent at lieing dealers who just want to rip you off because the clip test tells them to replace parts that are not really at fault or broken


My car is now running like a dream as it should without a murmer just perfect,

And it was all down to corroded dirty pins on the main ECU and wiring loom sockets at the ECU its a simple as that

I paid for a new throttle body that was not required 3 visits to the dealers and was told they had checked the wiring completely twice.............. utter crap otherwise surely that would have been picked up

All the dealers do is replace parts the clip test or ECU tells them i had a list well long of various things but, it was all false, there was nothing ever wrong with the parts at all just that the bad connections had caused the resistive values to go a hoop.

Now im told by a reliable source that when they are first put together at factory they spray a anti corrosive gel onto the plugs and contacts to prevent corrosion or water ingress, after a few years this gel sets rock hard and then looses it properites and hey presto u get corrosion and duff contacts on the plugs n pins at the ECU under the battery tray

It has taken my independant garage who have lots of diagnostic equipment a week to go thru my car with a fine toothcombe wiring loom everything and come out with the answers its geat.......... Why could the DEALERS not do this is just not right

Bear this in mind if i had have gone back to the renault dealers they wanted to change the coils , the fuel injection ECU , then the main ECU , thats what they told me would need to be changed utter carbage, unbeleiveable

Im just so chuffed its fixed its been a long 6 months
Of course the other outcome would have been that if the plugs and pins had been to badly corroded then a new loom and poss ECU might have been required but i carnt help but think if it had been picked up on my very first visit to the renault SPECIALIST Dealers then all this might have been prevented after all it was with tem 4 days and they throughly chcked all the wiring did you Really

Hope this helps anybody else who has gone thru this hell We dont have open cheque books RENAULT to replace everything your clip test says sometimes that lies too
trevstamf is offline  
The Following 5 Users Say Thank You to trevstamf For This Useful Post:
GarthLiddell (30th August 2011), longleigh (30th October 2014), maa1506 (26th March 2012), ruglenbhoy (21st October 2015), xsaravts1983 (12th September 2012)
Sponsored Links
post #17 of 129 (permalink) Old 26th October 2007
Junior Member
trevstamf's Avatar
Join Date: Aug 2007
Posts: 5
Nominated 0 Times in 1 Post
Nominated TOTW/F/M Award(s): 1
Thanks: 0
Thanked 8 Times in 2 Posts
Renault Laguna 2 - 1.8 16v Throttle Problem*FIXED*

for all you laguna 2 owners who have 1.8 16v petrol models mines an 02 plate and have encountered the ellicit Fuel Injection Fault, car goes into limp mode, no accelerator, then resets after half hour ,

I have a possible solution fix

Before you do anything else get the wiring loom checked out and especially the plugs and pins at the main ECU under the battery tray

If they are corroded or look dodgy clean and soak them with a suitable solution that can burn it off i dont know what kind but im sure you top mechaics can say that, all i know is it worked on my car after much cost at dealers and replaceing parts i never needed because the fault reoccured

A clip test or ECU read will throw up many daft faults but thats due to the connections being faulty

Its a bit of a job to do as an amature i beleive, but its saved my car

Now to try and recoupe some cost form my dealers as they should have picked it up in the first place and ive had parts replaced i didnt need and the problem remaind wish me luck
trevstamf is offline  
The Following 3 Users Say Thank You to trevstamf For This Useful Post:
GarthLiddell (30th August 2011), longleigh (30th October 2014), maa1506 (26th March 2012)
post #18 of 129 (permalink) Old 26th October 2007
Veteran Member
Technical Supremo
Lagdti's Avatar
Join Date: Dec 2005
Posts: 40,429
Nominated 2 Times in 20 Posts
Nominated TOTW/F/M Award(s): 18
Thanks: 149
Thanked 1,103 Times in 942 Posts
Thank-you very,very much for sharing your experiences with us,this should help out a number of members.

I've merged your threads,moved them to the Laguna knowledge base and 'stuck them' so they always remain at the top of the first page.

Excellent info,thanks once again.

I'd rather push my Alfa than drive a BMW....
Currently in Lagdti's garage:
2004 Saab 9-5 HOT Aero and a 2001 Audi A3 1.8 Turbo
Lagdti is offline  
post #19 of 129 (permalink) Old 2nd November 2007
Junior Member
Join Date: Jul 2007
Posts: 11
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 1
Thanked 0 Times in 0 Posts
Many many thanks to trevstamf to share your vary valuable experience. I owned this Laguna II 1.6 16V Expression 2002since 4 month ago, recently had exactly the same problem. My car is runing on LPG but this problem can come whether it is on petrol or LPG. It used to happen once a week, after driving for a while, stop to do some shopping, when come back, the "electrical fault" light went on and run into limp mode. From time to time it also happens during driving after a short break. Last week it started happening everyday. Sometimes a restart will solve the problem sometimes not.

After searching in the forum I also suspected the throttle body can be faulty. Last month after a long trip to France I had the car fully serviced and new igination coils , new sparks fitted. The guy in the garage told me the throttle body is working fine.

As an electronics engineer, my instinct told me it could most be a contacting problem somewhere. But I do not have any clue where to start with. Thanks to trevstamf's post. The day before yesterday I open my car for the first time by myself. I removed the battery, the sensor box and cleaned everything, reconnected doggy wires (I have many extra wire and some extra boxes for the LPG part). But I have not touched the ECU part. As far as I can see, the ECU is sealed in an metal box. It is covered by a piece of metal that I can not remove. I am thinking to buy a Haynes manual before proceed. I will try to make some pictures next time.

My Laguna was running quite ok for the last two day, but it is a bit too early to be happy.
Currently in mzhao's garage:
2002 Laguna II 1.6 Expression LPG

Last edited by mzhao; 2nd November 2007 at 12:25 PM.
mzhao is offline  
Old 2nd December 2007
This message has been deleted by Stoche.
post #20 of 129 (permalink) Old 3rd December 2007
Junior Member
Join Date: Dec 2007
Posts: 12
Nominated 1 Time in 1 Post
TOTW/F/M Award(s): 0
Thanks: 0
Thanked 1 Time in 1 Post
That's great news!

Hi trevstamf!

Thanks so much for sharing your experience! I have the same problem and Renault ######### have already replaced the throttle body !(263 pounds)

As I have Parts and Labor cover from AA I only had to pay 25 pounds for this. But I had to pay 43 pounds for their (mis)diagnosis and another 57 pounds for the hire car while they spent an eternity keeping my car at their garage!

It is amazing how clueless these dealers are!! If I hadn't checked the Internet they would have replaced every part they can think of without fixing this problem!

Now I will print this thread out and show it to them(Renault #########) and ask them to fix this!

I feel I should warn AA about this problem as well because they can pass this information on to the garages next time when they see this in a break down situation so their insurgence department doesn't have to pay stupid dealers who just replace expensive parts trying to solve this problem!

I am sure my problem is the same and I have finally found the solution! Thank you so much!
Currently in samsam's garage:
Y reg Renault Laguna expression

Last edited by Lagdti; 3rd December 2007 at 09:47 AM.
samsam is offline  

16v , laguna , problemfixed , renault , throttle

Quick Reply

Register Now

In order to be able to post messages on the Renault Forums :: Independent Renault forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome