Limp home mode... Headache!!

[Magnethutch]

Had a look over the forum and cant find an answer, so the problem...

So as above my clio 182 keeps going into limp home mode (If the car is restarted limp home mode goes) and the engine management light stays on (Right hand side of the speedo), ive had it hooked up to Renaults Diag computer. The faults that came up - Throttle pedal switch - Throttle body - lambda sensor.

1.So ive changed the throttle pedal and this doesnt fix the problem.
2.Changed the lambda sensor, engine management light turns off, but the problem continues.
3.Cleaned the throttle body, doesnt help either.

After changing the O2 sensor it didnt go into limp home mode for a couple of days. After being out in the car last night, it went into limp home mode and the engine management light came back on.

Any ideas, help or anything would be great,

Thanks

Sam

 

[Speedlover]

I had this.
All the wiring was checked for resistance and all ok.
However, the problem was chased to to the ECU and LOOM at Rentech. I was skeptical but that was over 6 months ago and all is super now. Not done it since.
But each to their own and yours is probably different to mine!

Tried changing te throttle body or pedal mate?

 

[Magnethutch]

Thanks for the reply, that doesnt sounds very cheap and after just changing the rear main and clutch im a little out of pocket. But yes ive changed the throttle pedal (looks nice) didnt work tho =[. But havnt changed the throttle body, guess this is the next step. Hope i can find a cheapish 2nd hand one.

Thanks again.

 

[matt172]

im having same problems mate do you have problems with your revs as well jumping to bout 2k and getting no response for pedal i had ignition coils changed worked for a while then came back yesterday if you find out anymore let me know fella

 

[Magnethutch]

Hi Matt172, i dont get the problem with it revving up like that, all is normal till it get stuck at 60mph on the motorway, what does drag!. Not sure but some others i have looked at with the engine revving like that often had temp sensor problems, just from reading other posts so dont quote me on that ha.

 

[Magnethutch]

As this problem is still going on after changing, Spark Plugs, Coil Pack, Ing Leads, throttle pedal, cleaned throttle body and new O2 sensor. Wiring has been checked for damage and all ok. Fault on Clip comes up as, DF002 throttle potentiometer circuit, 3 def incohearancy. (Dont understand it that well, just reading off what clip said).

Any ideas etc would be ace!
Thanks

 

[MR.172 Cup]

you alright Magnethutch, did you find out what the problem was? I have exactly the same problem as yours! ive booked it in for a throttle body change on Friday but was wandering if was something else that solved it?

 

[0-100mphin15sec]

Any joy with solving your issue?
I have the exact same problem with my 172, have done for the past 1.5 yrs:S Idles perfect but goes into limp mode out of nowhere. Switch ignition off then back on and all is fine for anywhere between 30sec to a few days. Also after doing this a few times, up pops the engine management light at the far right of the instrument panel??
Changed the pedal, didn't solve the issue, cleaned the throttle body which solved the problem for about a week also checked the loom etc.

Now going for a 2nd hand body. If this doesn't work it will be booked into Renault

 

[M@tt_182]

I had the same sort of problem on my 1.2 Clio, turned out to be a TB issue. I sourced a second hand one complete with all sensor and it solved the problem. I'm not saying this will solve it but it could be worth swapping it over with a friend/someone on the forum to see if it solves the issue?

 

[0-100mphin15sec]

Cheers for the reply Matt.
Sounds like the right way to go, so will get one from ebay today. Just hope it's not faulty. Have been told that the item is tested and it comes with a return policy. Will let people know if it solves the issue once fitted if interested.

 

[Hollymac90]

Hi
Could anyone tell me if they managed to sort the issue with this EML and limp mode? I have this same issue! tia

 

[STEVE.M]

Hi
Could anyone tell me if they managed to sort the issue with this EML and limp mode? I have this same issue! tia

Where you located?

 

[Hollymac90]

Where you located?

I'm in Darlington

 

[STEVE.M]

I'm in Darlington

There is a 90% chance this is caused by corrosion in the engine bay wiring loom.
Can anyone suggest a sport specialist closer to Darlington than Diamond Motors in Long Eaton?
Golden rule is do not go changing parts on the strength of code readings,as evidenced by previous postings in this thread and the many others on the same subject.

 

[Hollymac90]

There is a 90% chance this is caused by corrosion in the engine bay wiring loom.
Can anyone suggest a sport specialist closer to Darlington than Diamond Motors in Long Eaton?
Golden rule is do not go changing parts on the strength of code readings,as evidenced by previous postings in this thread and the many others on the same subject.

Hi
Thank you! Yes people keep telling me you will need a new throttle body etc, but I refuse to do this because like you say about other threads my boyfriend is going to check the wiring from top to bottom Tuesday (he's a mechanic) but I will tell him what you said about the engine bay wiring loom and I won't give him permission to start changing parts, he's had his machine on and it's coming up with an incoherence between track 1&2 and a new recent fault which reared it's ugly head was an O2 sensor fault.

 

[STEVE.M]

Hi
Thank you! Yes people keep telling me you will need a new throttle body etc, but I refuse to do this because like you say about other threads :smile: my boyfriend is going to check the wiring from top to bottom Tuesday (he's a mechanic) but I will tell him what you said about the engine bay wiring loom and I won't give him permission to start changing parts, he's had his machine on and it's coming up with an incoherence between track 1&2 and a new recent fault which reared it's ugly head was an O2 sensor fault.

|That`s about par for the course,previous owner of my car changed for new throttle body & pedal on the strength of incoherence reading,totally wasted his money.
The large white plug in the engine bay fuse box is frequently the problem,not always the plug pins themselves,but the wires that connect to them.
I have had mine done twice now,but it comes back in 9 months or so.
I`m beginning to think post 2 of this thread may be onto something,and I have seen it suggested elsewhere that ECU`s can be faulty.
What confuses me is that if it is the wiring,why does flicking the ignition on & off rectify the problem on a temporary basis?
It cannot alter the resistance in the wiring if caused by corrosion?
Also it seems to happen cruising,but not when being used hard.

 

[Hollymac90]

|That`s about par for the course,previous owner of my car changed for new throttle body & pedal on the strength of incoherence reading,totally wasted his money.
The large white plug in the engine bay fuse box is frequently the problem,not always the plug pins themselves,but the wires that connect to them.
I have had mine done twice now,but it comes back in 9 months or so.
I`m beginning to think post 2 of this thread may be onto something,and I have seen it suggested elsewhere that ECU`s can be faulty.
What confuses me is that if it is the wiring,why does flicking the ignition on & off rectify the problem on a temporary basis?
It cannot alter the resistance in the wiring if caused by corrosion?
Also it seems to happen cruising,but not when being used hard.

Yeah we had the white plug out as someone mentioned the pins could be corroded but we never thought to check the wiring, I will pass that along with a screen shot of post 2 and hopefully he can find the problem, yeah it's odd how knocking the car off and back on cures the issue but for a shotlot time, this hasn't worked for me recently and iv had the limp her home on a few occasions, took her out today and the light never came on at all, so frustrating, couldn't get the thing off on Friday! He's gonna give her a good look over on Tuesday so I will post an update on how we got on fingers crossed !

 

[Ol’ Tarby]

@Hollymac90
You hit "report" instead of reply. So I've copied and pasted this over for you


@STEVE.M

Yes, we have had the white plug out as someone mentioned corrosion on the pins, that did the job for maybe a week or 2 but the problem came back, we didn't check the wiring though so I'll mention that to him when he gets in too, yeah it's odd how knocking the car off and back on clears the problem but these last couple of days that hasn't worked but that's only been since the O2 sensor fault popped up. I didn't take her out for a drive yesterday I thought I'll leave her parked up cos the day before the light was just coming on every minute or so and I was just getting narked off with it, but I took her out today and the light never came on at all, I'll take a screen shot of post 2 and pass the info along aswell and hopefully he can find the issue

 

[Hollymac90]

@Hollymac90
You hit "report" instead of reply. So I've copied and pasted this over for you


@STEVE.M

Yes, we have had the white plug out as someone mentioned corrosion on the pins, that did the job for maybe a week or 2 but the problem came back, we didn't check the wiring though so I'll mention that to him when he gets in too, yeah it's odd how knocking the car off and back on clears the problem but these last couple of days that hasn't worked but that's only been since the O2 sensor fault popped up. I didn't take her out for a drive yesterday I thought I'll leave her parked up cos the day before the light was just coming on every minute or so and I was just getting narked off with it, but I took her out today and the light never came on at all, I'll take a screen shot of post 2 and pass the info along aswell and hopefully he can find the issue

Yes I did! I do apologise thank you!

 

[RichieJA]

Had this was tb, changed it sorted

 

[Hollymac90]

Had this was tb, changed it sorted

Your the first iv heard say that fixed the problem lol

 

[RichieJA]

Funny enough I had a sticky rear caliper and I was driving to pick up one from a car that was being broke and the car went in limp mode, when I arrived I said to the guy he had a spare tb, we changed it over solved the problem.

What did notice that worths checking, is when it was in limp mode there was an odd noise from tb a click rather than the usuall buzz, the new one only made the normal buzz,
The fault went away when engine was turned off and on but came back randomlunch
(Was an hour and half drive )

 

[STEVE.M]

[QUOTE="Hollymac90, post: 11218007, member: 111092"Iit's odd how knocking the car off and back on cures the issue but for a shotlot time, this hasn't worked for me recently and iv had the limp her home on a few occasions, took her out today and the light never came on at all, so frustrating, couldn't get the thing off on Friday! He's gonna give her a good look over on Tuesday so I will post an update on how we got on :smile: fingers crossed ![/QUOTE]

Another trick I`ve found is that if the ignition on/off does not work,pumping the accelerator pedal to full deflection 2 or 3 times with the ignition off also clears the limp mode.
I have cleaned/checked the pedal pins connection for poor fit & have a couple of pedals & borrowed a 3rd,including the 2013 manufactured one the previous owner had fitted,so I am convinced it is not a pedal fault.
If your man comes up with something,please post and give me a PM.

 

[STEVE.M]

Had this was tb, changed it sorted

You are the lucky one.

 

[Hollymac90]

Funny enough I had a sticky rear caliper and I was driving to pick up one from a car that was being broke and the car went in limp mode, when I arrived I said to the guy he had a spare tb, we changed it over solved the problem.

What did notice that worths checking, is when it was in limp mode there was an odd noise from tb a click rather than the usuall buzz, the new one only made the normal buzz,
The fault went away when engine was turned off and on but came back randomlunch
(Was an hour and half drive )

Yeah mine clears when I knock the engine off and back on aswell

[QUOTE="Hollymac90, post: 11218007, member: 111092"Iit's odd how knocking the car off and back on cures the issue but for a shotlot time, this hasn't worked for me recently and iv had the limp her home on a few occasions, took her out today and the light never came on at all, so frustrating, couldn't get the thing off on Friday! He's gonna give her a good look over on Tuesday so I will post an update on how we got on :smile: fingers crossed !

Another trick I`ve found is that if the ignition on/off does not work,pumping the accelerator pedal to full deflection 2 or 3 times with the ignition off also clears the limp mode.
I have cleaned/checked the pedal pins connection for poor fit & have a couple of pedals & borrowed a 3rd,including the 2013 manufactured one the previous owner had fitted,so I am convinced it is not a pedal fault.
If your man comes up with something,please post and give me a PM.[/QUOTE]

 

[Hollymac90]

I'll keep that in mind next time the off and back on doesn't work thank you, yes I will let you know, he'll find the issue I have no doubt, it may just take a little time lol

 

[bloke]

the only time i've had one with a faulty body it only showed up after a loom fault was sorted, what a bloody headache that was!!

a lot of the swapping the body over moves the loom enough to 'fix' the problem only for it to pop up again.

 

[Hollymac90]

Did you fix the wire your self? If so do you remember where the break was?

 

[bloke]

done plenty of them but pretty much all had different wiring problems. just a case of checking through the wiring with probe/meter etc...

 

[Hollymac90]

Ahright OK thank you

 

[bloke]

get it plugged in and see what it brings up.

 

[Hollymac90]

 

[RichieJA]

It's the only repair I ever had that worked first time and didn't cost a fortune and go over 3 fourm posts, anyone who knows me on this knows my car is a piece s**t basterd....
I do love it thou.

 

[Hollymac90]

Ha, I love mine too, otherwise I wouldn't be chewing on with this issue lol