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fault code df012

April 23, 2012, 11:07 am
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hi all im new to site but ive had my scenic for the past 7 years and ive had a trouble free 140k until now im a time served mechainc and the other day my check engine lighr came on giving 2 messages (1) check emmissions (2) check injection. the last time it said injection it required glow plugs how ever this time i got a different fault code df012 sensor supply no.2 voltage,sensor reference voltage too low ??????? afterr checking various units voltages (air flow,egr, throttle pedal cam and crank sensors ) to name a few i ran out of time and had to give up for the day however when i started the car all lights went out and its been fine since :confused::confused::confused: has anyone else had simalar problems and fixed it or is it time to invest in a new scenic. ive googled the code and got a load of poop about rhe code but no answers :(:mad:
sorry for the long thread but i feel more inf is always best
thanks for any help given ill try anything if it works
and if i can help anyone ill try i have the latest version of auto data and as i said ive been a tech and mot teaster for over 20 years however this is first time ive really been stuck and am reluctant to goto renault as i dont trust them
again thanks in advance for any heil give
EGR Exhaust Gas Recirculation

EGR is a NOx (nitrogen oxide and nitrogen dioxide) reduction technique used in most gasoline and diesel engines.

EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders. Intermixing the incoming air with recirculated exhaust gas dilutes the mix with inert gas, lowering the adiabatic flame temperature and (in diesel engines) reducing the amount of excess oxygen. The exhaust gas also increases the specific heat capacity of the mix lowering the peak combustion temperature. Because NOx formation progresses much faster at high temperatures, EGR serves to limit the generation of NOx. NOx is primarily formed when a mix of nitrogen and oxygen is subjected to high temperatures.
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Renault Clio Mk1 Rubbing rear arches

April 23, 2012, 11:08 am
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Hello people.. My clio has started rubbing the rear arches & is VERY low to the ground when i have 3 people in the back.
It is not lowered & has standard 13" steelie wheels.
I have had a look at the shocks on the back, they seem fine, & they passed the nct here in Ireland last month with a 1% imbalance.
I can't feel anything strange towards the back when driving either.
They are the original shocks, it's 1998 with 83,000 miles on it.
Would new shocks solve the problem people?(there are no springs on the back, just shocks).

Thanks
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How do i play films on the carminat tomtom in megane 2011?

April 23, 2012, 11:15 am
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There have been a few videos on the internet of it working but not explaining how to do it, does any1 know what software I would need for it to work and how to do it please

Thank you
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Megane I locking problems

April 23, 2012, 11:29 am
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Hello,
I need to replace the front door locking system and hatch locking system - the lock-engine died and I did not found those anywhere ,so I guess it is easier to replace the whole locking system on hatch and on front door and buy those from junkyard.

I would like to know that can I use megane 1997(Pre-facelift) hatchback locking systems on my 2001(1999–2002, facelift) hatchback?
Martin
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Where is the tdc sensor on megane alize

April 23, 2012, 11:41 am
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I have a Megane alize 1600cc automatic V reg. I see that several people have the same problem starting when warm. Watched a film showing where it is, but mine isn't there. Hope someone knows as I can't really afford to put it in the garage and was hoping to do it myself.
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1.5dci non start

April 23, 2012, 12:28 pm
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Lads,

I have checked the forum for hours to try and find a cure for my car but tried everything ive found so far so i have to post my first thread.

I have a 1.5dci clio which is not starting and looking for someones expertise. The problem started a few month back when the problem was intermittent, when sometimes i would go to it and there would be no glow plug light or heater light illuminating with all the other dash lights when i put ignition on. When this happened my immobiliser light would not go off after the few seconds which it should. When this happened the car would not start it would crank for a couple seconds then seems to cut out as if the immobiliser cuts it. Other times it would start and run no problem......

Now couple month down the line the car wont start at all with the faults listed above. I have checked all fuses, swapped relays in engine fuse box, tried and checked the key, check on wiring all seem ok. I have also connected 3 seperate universal code readers onto the car and none are able to connect to E.C.U. Therefor i believe it could be the E.C.U. and i am going to send this away to be checked.

But if anyone has any other ideas i would be grateful for your input!

Cheers :d
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renault scenic 2.0 fuel rail

April 23, 2012, 12:56 pm
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hi i'm having trouble with my scenic cambelt snapped. Have sorted that out and put everything back together but it's running rough i first thought it was the timing so i checked it follwing the steps of the haynes manual and it all seems ok. The only thing i can see that might be missing is a connection on the fuel rail. not sure if something should plug in here and where it would go. I can't remember if i took anything out of there (been doing the job for about a moonth on and off) and theres nothing left in my box of bits. I have added a photo with the connection circled

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Newbie

April 23, 2012, 1:14 pm
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Hi every one.
Just thought I'd introduce myself. I'm from Cumbernauld in Scotland and have just bought a Laguna 02 plate with a couple of issues and hope to find answers or help.
I have searched and found a few things I can try already so hoping I won't have too much heartache.
Thanks in advance to any help and advice offered.
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movano (master) non-starter

April 23, 2012, 1:20 pm
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Hi everyone, and thanks in advance.

2000 Movano 2.5 non-turbo. 80k. Had it for 10 years.

Out of the blue wouldn't start. Cranking but not firing and lots of unburnt fuel coming out. AA man put his starter pack on and it fired straight up. He checked the glow plugs and diagnosed one had failed. Ran and started perfectly the rest of the day. I've changed all four plugs and guess what - still won't start.

As problem only from cold, logically still a plug problem. Does that alloy box on the o/s inner wing control the plugs, or is there another relay somewhere. Where do I start?

I'm no mechanic, so speak slowly!!

Any help/suggestions very much appreciated.
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Clio - Lights change intensity when idling and a slight miss in the exhaust sound.

April 23, 2012, 1:29 pm
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We have a 1.6 Clio 16valve that sleeps out in the rain and has just developed the above fault. Once going everything is fine. Its only when idling or at slow speed that it happens. Please can anybody suggest where to start - we have done nothing yet because of the weather.
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Renault Trafic 1.9 DCI100 Trouble starting

April 23, 2012, 1:34 pm
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Hi, I have a 1.9 DCI100 Trafic van with 97K on the clock. It has just developed a fault when starting from cold.
It 'hunts' for a idle speed and keeps dropping revs. Whilst doing this it's producing black smoke, it seems to be chugging.

Then when pulling away I get the biting point of the clutch, then the revs drop by at least 200. This causes kangerooing down the road, with lots of black smoke, along with much embarressment!

I held down the throttle peddle to keep the revs up and get a clattering noise, and even more black smoke.

The EGR valve has been cleaned out with an airline which hasn't helped.

Once the engine is warm it idles properly. I just have the kangerooing, clattering noise, jumping revs when pulling away and black smoke, but no 'Hunting'

I have had the clutch replaced along with the cam belt at 80K if this makes any difference.
The cam shaft sensor, Air Flow Mass sensor, Tyre speed sensor and another one I cant think of, have been replaced recently.

Please help this is doint my head in!!
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2004 2.2dci Espace EM Light

April 23, 2012, 3:31 pm
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Hi.

I posted this in the wrong forums section so i got no replies:

http://www.renaultforums.co.uk/showthread.php?p=846700

I however still need some help.

I took the EGR valve out to day and it was clogged up. The valve itself was seized closed with loads of solid carbon and one of the entrance hole in the second section was completely sealed shut. It all cleaned up nice with carb cleaner and was then reinstalled.

The turbo and power was plainly obvious and was 200% better however the EM light still came on when the engine was put under 2000rpm in 4th gear the first time and at different rpm's there after.

Ive noticed that their is a split in the rocker cover housing and this in turn is spraying oil over the left side of the engine. This will be my next port of call to replace. However i have 2 questions.

1. If the EGR valve was the clogged up should i have stripped it back even further to see if the housing and inlets where as badly clogged up?

2. On my engine it is missing a little hose that attached to a part above the EGR valve but attached to the actual cylinder head/cover. Ive taken a pic of an engine out of the bay and highlighted the part in red that the hose is missing off. Its obviously in a loop but I'm puzzled what it is and if its in anyway the cause of my problem?

The yellow box is where the crack in the cover is and this was re affirmed by trying to seal it with superglue and a bubble being seen coming from behind the bolt you can see.

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Renault megane 1.9dci fault

April 23, 2012, 10:49 pm
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Please can someone help, renault megane 1.9dci keeps coming up with fault on dashboard which reads select neutral and car jolts with interior light coming on, already had fuel regulator replaced....can anyone help pleaseeeeee!!
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Dials change from 225 onto 165 GT

April 24, 2012, 12:35 am
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Does anybody know if the speedo dials would need coding to my car or if it would be direct replacement if I was to take the dials from a 225 onto my GT?
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tyre size

April 24, 2012, 2:08 am
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can any one tell the tyre size for the spare steel wheel for a laguna 2009 2.L diesel estate.

thanks
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clio 2 trip computer switch miles to Kms

April 24, 2012, 2:18 am
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Hello
I have a clio sport 182 2005 with a working trip computer.... I would like to be able to switch the display from miles to Kms .... then combined with the cruise control I can be sure of my speed when traveling on the continent ... is it possible... how ??
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renault master pre tentioner

April 24, 2012, 2:22 am
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51 plate master need help changed passenger front double seat for a single and sold it ,air bag light on now.
fitted pre tensioner from single seat and light wont go off ,are passenger and driver pre tentioners different resistance values?
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Loss of Power - TDC Sensor to Blame or Not??

April 24, 2012, 2:29 am
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Hi,

Ive been looking at the forum for a little while now when my 1998 Mark II Clio started having intermittent starting problems, especially when engine was warm/hot. I found many very helpful threads about the TDC sensor & as a result my father located & cleaned it without having to pay expensive garage bills :d However at the moment I am not sure if this has solved the problem as Ive yet to go on a long enough journey to really warm up the engine.

I learnt that the TDC helps to start the car, but can a faulty one cause the car to stall / lose power once the car is being driven? Because the other morning my car just lost power as I turned a corner. Nothing, I just glided to a halt, thankful on a quite residential estate, rather than a motorway. I had only driven the car about 4 miles, so the engine was not warm / hot, initially it would not start but three attempts later and it started, and I got to my destination. Would this be the TDC Sensor? Maybe I do need a new one, or could it be something more serious? I am concerned if my father changes TDC and I then drive car on busy main road that I may lost power again. But I am so reluctant to pay high garage charges, if it a quick fix with the TDC sensor. Once at my destination I started car, no problem, however the fan kicked in immediately??

Are these problems related?

Any help would be much appreciated, as money is tight, but Im a little relucant about trying to do it myself if its something more serious than replacing the sensor and that I conk out again on a busy road.

Thanks for your time.
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espace 2.1 95 injector /pump issues

April 24, 2012, 3:08 am
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hi all i have a 2.1 95 espace the injection pump leaked so changed it for a spare i had ( this pump was off but was working on a previous espace ) on fitting the car will drive under no pressure up to 2200 revs but above that stutters /misses and makes going up hills a hope and prayer, i,m going to change the injectors with some spares , if i have to buy new nozzles is there anything i need to know to split the injectors into or should i be looking back at the pump for my issues .......ps the car has done 180000 and runs on bio please adivse thanks spence
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scenic II dci 80 vs dci 120

April 24, 2012, 3:38 am
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HI all looking at buying another scenic! but would like to know which of you guys prefer - dci 80 or dci 120?
Dci 80 I believe offers cheaper tax, cheaper insurance, better mpg but is slow, weak and struggles?

Dci 120 is more expensive on all but stronger, pulls like a dragon, has 6 speed gearbox and only slightly less mpg?

I really like the idea of 6 speed, crusing along at 80 at 2500 rpm rather than screaming at 4000-4500 rpm like my current scenic does!

All advice helps and what to look for and what goes wrong? its done 140000 but fully serviced and maintained and cam belt etc was done recently!
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