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Resetting warning lights on a Renault Scenic

  • 10-07-2022 7:12am
    #1
    Registered Users, Registered Users 2 Posts: 471 ✭✭


    I recent had a lot of work done at a garage on my 2011 Renault Scenic. I have no complaints on the quality of the work though the mechanic didn't reset the engine fault codes. This means I still get the error messages when I start the car.

    He did mention this at the time to kind of waved it away. I though I had read somewhere that engine fault codes clear if the fault doesn't reoccur after 29 engine restarts so I wasn't particularly bothered.

    Now fast forward a month and I have the NCT on Monday morning. The garage won't reset the codes until after the NCT, so any other faults the NCT picks up can be worked on too.

    I am worried though that with the fault codes on they will just fail the car and not run through all the tests. Is the mechanic right in his advice. He told me it takes over an hour to reset but I am sure I saw a mechanic reset the codec in a few seconds before using a handheld computer of some sort.

    Is it possible to resent myself? Is it something a main dealer could clear for me quickly?

    The fault codes relate to the breaking system (which was reworked in a big way last month) and the air filter.

    Thanks in advance.



Comments

  • Registered Users, Registered Users 2 Posts: 5,582 ✭✭✭greasepalm


    If brakes have a fault stored it would need a scanner to check and remove them and many fault codes need removing via a scanner.

    Unsure if they do or dont refuse the test , ring them up but is too late to cancel and be charged for it go for it.

    https://www.ncts.ie/media/b0jd3jlq/nct-manual-june-2021.pdf



  • Registered Users, Registered Users 2 Posts: 839 ✭✭✭mk7r


    If I had to guess I'd say your faults aren't fixed



  • Registered Users, Registered Users 2 Posts: 471 ✭✭Shutuplaura


    Honestly, I am not convinced that this is the issue. The garage in question has a good reputation locally and it certainly feels like it runs better.


    Thanks for the advice anyway, I will bring it to the test and see what they say.



  • Registered Users, Registered Users 2 Posts: 9,282 ✭✭✭PsychoPete


    Check the brake fluid level that can cause the "brake system fault" error to come on



  • Registered Users, Registered Users 2 Posts: 839 ✭✭✭mk7r


    It does not take an hour to reset the codes. the only way the mechanic can confirm his repair was successful is to check the fault code status. Most parking brakes codes on the scenic are self extinguishing so if the fault is still present on the dash there is still a problem.

    There is no such thing as an air filter code, likely dpf filter you mean which is a much bigger issue.



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  • Registered Users, Registered Users 2 Posts: 471 ✭✭Shutuplaura


    I have seen someone reset a warning code in a few seconds so I am a bit annoyed with them for that. Honestly I otherwise think that the car is driving well. I will check the brake fluid as another poster suggested. The warning code is actually 'Check Anti-Pollution System'. The garage have a good reputation and I'd be really disappointed if they are giving me the run around. I do think they are incredibly busy at the moment and don't want to spend much time on cars. But as we all know, mechanics have a lot of power of members of the public who know nothing about cars.

    Thanks again for your adivce to everyone. I'm going to do a final few things myself and bring it for its check. I'll post here how it goes...hopefully I won't be looking for a new garage recommendation!



  • Registered Users, Registered Users 2 Posts: 471 ✭✭Shutuplaura


    The car passed everything against the emissions test, which they didn't do because of the warning light. Trying to contact garage about resetting and then I will go again. Would a garage be able to run an emissions test of their own to confirm it's okay or should I go to a specialist pre-nct place?


    Thanks again.



  • Registered Users, Registered Users 2 Posts: 5,582 ✭✭✭greasepalm


    Yes a good garage with an emissions tester would be needed after codes were cleared and car brought for a run , petrol and diesel machines are different so say which they need to test.



  • Registered Users, Registered Users 2 Posts: 471 ✭✭Shutuplaura


    Great. Thanks for the advice, I'll do this.

    Thanks all, really appreciate it.



  • Registered Users, Registered Users 2 Posts: 471 ✭✭Shutuplaura


    A further update - the car actually might need a New Air Flow meter. The mechanic recommended I take it to the main dealer for this, because it isn't straightforward to do it.

    Anyway, I might start another thread in the main forum for this. Thanks again.



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  • Registered Users, Registered Users 2 Posts: 2,299 ✭✭✭Lewis_Benson


    Find a different mechanic



  • Registered Users, Registered Users 2 Posts: 1,209 ✭✭✭GavPJ


    Air flow meter is one of the most simplest jobs on a car.

    Sounds like he is fobbing you off and doesn't want to work on the car anymore.



  • Moderators, Category Moderators, Arts Moderators, Sports Moderators Posts: 50,885 CMod ✭✭✭✭magicbastarder


    i had the cosmic bad luck for my immobiliser to glitch just as the NCT mechanic tried to drive the car into the NCT test. i 'fixed' it by disconnecting the battery for several minutes.

    brought it to my local mechanic who cleared all the fault codes (which also reset the airbag warning light which appeared after reconnecting the battery) and he didn't charge me for it.



  • Registered Users, Registered Users 2 Posts: 471 ✭✭Shutuplaura


    Awww crap. I told him to go ahead and change it. Ah well, Get the car back tomorrow. Hopefully its fixed at least.



  • Registered Users, Registered Users 2 Posts: 839 ✭✭✭mk7r


    Get a new mechanic, quickly



  • Registered Users, Registered Users 2 Posts: 471 ✭✭Shutuplaura


    ITs fixed, air flow meter needed cleaning is all. Didn't charge much, all things considered. Fairly happy with it once it doesn't reoccur. Thanks all.



  • Registered Users, Registered Users 2 Posts: 5,582 ✭✭✭greasepalm


    I did also wonder if throttle body is also manky with crap and was that cleaned. Did he bring car for run and do emissions test after?

    All fault codes checked and removed.



  • Registered Users, Registered Users 2 Posts: 471 ✭✭Shutuplaura


    Well two more lights came on over the weekend so I'm bringing it back. It may not be his fault. starting to think the car is profoundly banjaxed. Might bring it to the main dealer for a proper diagnostic.



  • Registered Users, Registered Users 2 Posts: 1,209 ✭✭✭GavPJ


    Laura I don't mean to sound like a pessimist but I've never heard of an air flow meter being cleaned and curing the fault.

    They are the sort if thing that either works or it doesn't.



  • Registered Users, Registered Users 2 Posts: 1,339 ✭✭✭Viscount Aggro


    Nope mod edit



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  • Registered Users, Registered Users 2 Posts: 1,209 ✭✭✭GavPJ


    Having an engine light on the dash is NOT an NCT fail. Email NCTS and they will tell you the same.

    However, if the light is on and causing your emission's to be off or too high due to a faulty sensor etc

    that will cause the car to fail. 👍️



  • Registered Users, Registered Users 2 Posts: 1,339 ✭✭✭Viscount Aggro


    "Arriving to an NCT Centre with an illuminated warning light is a serious no no. A lit up airbag warning light spells immediate failure. If your Engine Management light is showing, your NCT inspector might not even conduct the test"

    This is what I have been told.



  • Registered Users, Registered Users 2 Posts: 1,209 ✭✭✭GavPJ


    That is what google will tell you. Honestly an engine light on is not an instant fail and your engine/car would want to be in

    a serious bad way for the tester to refuse the test over an engine light on.



  • Registered Users, Registered Users 2 Posts: 839 ✭✭✭mk7r


    The engine light is an instant fail for a number of years now if the car is diesel.



  • Registered Users, Registered Users 2 Posts: 1,209 ✭✭✭GavPJ


    Took a 2007 Avensis with an EML on for test in Jan 2020 and it didn't fail on it.

    Failed on a brake hose. Fitted the hose, took it back with the EML on and it passed.

    Reset the EML and the car was good as new.



  • Registered Users, Registered Users 2 Posts: 839 ✭✭✭mk7r


    It has been in the manual since 2016 ish and cars fail for it every day



  • Registered Users, Registered Users 2 Posts: 1,209 ✭✭✭GavPJ


    My NCT centre must like me so. :-)

    See they are supposed to plugging in diagnostic scanners since June last year.

    I don't know of anyone that has had this done yet. Has it been knocked on the head?



  • Registered Users, Registered Users 2 Posts: 5,582 ✭✭✭greasepalm


    I have never seen the nct plugging in any diagnostic machine into any car in 30 odd years or so as to many machines and diagnostic ports for loads of models.

    Your car is supposed to be ready for the nct .



  • Registered Users, Registered Users 2 Posts: 1,209 ✭✭✭GavPJ


    All cars have the EOBD/OBD sockets in them now. There is a notice up

    on the walls of all the NCT centres too. I haven't seen it done yet.


    faq-doc-on-obd-and-other-changes-21st-june-2021.pdf (ncts.ie)



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  • Registered Users, Registered Users 2 Posts: 2,063 ✭✭✭UrbanFret


    Buy a cheap diagnostic fault code reader on ebay and clear the faults before you go into the test centre.



  • Registered Users, Registered Users 2 Posts: 1,209 ✭✭✭GavPJ


    Some half decent ones on Donedeal and Adverts too.



  • Registered Users, Registered Users 2 Posts: 5,582 ✭✭✭greasepalm


    Depending on your car the older ones can have an issue.

    I have a suitcase here with multiple adapters all needed at that time



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