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Thread: Renault Clio 2001 1.5 dCi Low Power - Electrical Warning Light

  1. #1
    Join Date
    Feb 2009

    Unhappy Renault Clio 2001 1.5 dCi Low Power - Electrical Warning Light

    Hi all,

    I'm having a bizzare issue with my Renault Clio 2001 1.5 dCi Dynamique.

    Mechanical wise, the car is great, however.
    During, or shortly after wet weather, the glow-plug/electrical fault light comes on and I lose power.
    Not all power, it just seems to take a hell of a long time to accelerate. I can't take over other cars quickly etc..

    I've read alot about the 'limp mode' that the ECU goes into when the Engine Stop light comes on that limits you to 3000 revs but this doesn't appear to be happening to me.

    The symptoms are as follows:

    * After rain, light comes on, sometimes during driving, sometimes from start
    * When light is on, Idle revs is above 1000X RPM unlike <1000 like normal
    * When you depress the brake pedal with left foot and use right foot to rev, nothing happens.
    * When you release break, you can rev but it is delayed.
    * During driving, when you change gear, even though your foot is not on the accelerator, when you put the clutch in, the engine revs up for about half a second before settling down.
    * Sometimes you can get the light to go out by quickly flooring the accelerator, quickly releasing it, the light will go out and you can "catch" the revs back and all the power back.
    * When the light is on, you have to change into 2nd to go up hills otherwise you slow to about 20MPH on a slight incline.
    * When the light is on, you can't overtake lorries, just so little power.
    * When the light is on you CAN get to about 90MPH but it takes about 5 minutes on a flat surface.
    * When you depress the brake pedal, indicate right or put the car into reverse, the rear fog light indicator on the dash board comes on very faintly

    First error codes indicated that the following faults were registered by the ECU:

    * F/L ABS Sensor fault
    * Glow Plug Open Circuit
    * Throttle Potentiometer TRACK 1
    * Throttle Potentiometer TRACK 2
    * Brake Light Earth Fault

    Things that have been replaced:

    * ABS ring was freely spinning around the drive shaft, new drive shaft fitted
    * New set of glow plugs fitted.
    * New Throttle pedal, with body and everything fitted.

    The dealer who I bought it off who has been kind enough to pay for the above replacement parts also mentioned that the short wiring loom can trigger this error but to try the new pedal first.

    Can anybody shed any light on this issue it would be much appreciated.

  2. #2
    Join Date
    May 2008


    The brake pedal has a switch above it that is linked to the ECU. When you brake, this switch tells the ECU and it cuts the fuel as well as putting on the brake lights.
    So, the brake lights or switch need looking at first as they are on the fault list but not yet rectified.
    Renault wiring is not the best and while you have replaced the potentiometer in the pedal, the fault may be a broken wire or poor connection.

  3. #3
    Join Date
    Feb 2009


    How come when the car is working properly (during dry weather), I can press both pedals and still rev?

  4. #4
    Join Date
    Feb 2009


    does it have original rear light units on or modified after market ones? usually when the fog light indicator light comes during brake pedal press there is a bad earth on one of the rear light units, check the pins and terminals to see if one looks "burnt" or overheated. The power should be cut when the brake pedal is pressed along with the throttle, all renaults have this feature. If you have replaced the pedal/potentiometer and still have a problem then you should check the terminals in the connector for the pedal.

  5. #5
    Join Date
    Feb 2009


    OK, so I cleaned the back light terminals with switch cleaner and applied some contact grease.

    All the codes have gone away but occasionally I still get the Electrical Warning light and it APPEARS as though the turbo doesn't work.

    IE, Very hard to overtake lorries and stuff, takes ages to get up to speed.

    When the light has been on i get the TRACK 1 and TRACK 2 codes.

    The garage are convinced they keep fixing the problem, obviously they haven't .

    It only appears to do this when I've taken the car through a car wash. in light rain it'll do it, but in heavy rain it doesn't seem to do it.

    It's very very strange and I am at the end of my tether with it now.

    I have even unplugged the ECU (3 large connectors) for a full day and the same stuff happens.

    Does anyone have any ideas?

  6. #6
    Join Date
    Feb 2009


    just to note aswell, so far I have had the following 'fixes' to my car:

    EGR Valve cleaned,
    Throttle Body replaced,
    Rear light block connectors cleaned,
    Cable from throttle body to ECU replaced (Although only about 2 feet of it as they had to cut the wires and solder them together, personally I think this was a stupid idea as it doesn't cover any cabling faults in the wiring loom through the bulkhead which is where I am CONVINCED the problem lies).

  7. #7
    Join Date
    Jul 2010


    I had a 1.5dCi Clio on an 05 plate that had only done 88,000 miles which I had to scrap recently after only owning it for 8 months.

    I had the problem with the coil / warning light coming on and struggling to overtake things and had to stamp the accelerator for the light to go off and get a boost of power.

    Eventually mine didn't start one morning and after getting it checked out it was low on compustion (0 on a couple of cylinders) and the repair bill would have been rediculous, couldn't even put an accurate figure to it. I'd looked after it it too had only just had a new injector a couple of months prior to it packing in.

    Anyway, for the sake of about £50 get this checked, if its low get rid and dont go near one ever again. When I scrapped mine the bloke who took it had another 6 in the yard with the same problem.
    Last edited by Jonny52002; 25-02-11 at 13:18.

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