How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Robert Your Own Question
Robert, Renault Technician
Category: Renault
Satisfied Customers: 4716
Experience:  Fully qualified 19+yrs exp/self employed technician in the UK
Type Your Renault Question Here...
Robert is online now

there my toxic pollution warning light has just come on

Customer Question

hi there my toxic pollution warning light has just come on
Submitted: 3 years ago.
Category: Renault
Expert:  Robert replied 3 years ago.


What Renault Year / model / engine / fuel type do you have?

Any running issues since this warning appeared?

What if anything has been checked or replaced already upto now?

Mileage / recent repair history?

Customer: replied 3 years ago.

renault twingo 2007 unleaded

yea it driving but sluggish if that make sense

60000 approx had a pipe repaired last may

Expert:  Robert replied 3 years ago.

Ok..In regards ***** ***** mentioned warning the toxic fume warning is basically the vehicles exhaust gas monitoring system - more often that would flag up if there is a monitored change in fuel/air mixture ratios as per the exhaust gas maybe caused by an engine management sensor running out of parameters or either ignition system fault - ie:- failing coils thus the fuel injected isn't being burnt efficently and this is where the emissions system picks this up or as you say maybe a duff sparkplug but usually a slight missfire/power loss would be experianced usually and seeing as you have had it serviced recently and plugs where included i cant see it being them unless there cheap plugs - other issues associated can be faulty oxygen sensor/or a failed cat converter - from what your saying it could well be failed cat or ignition coil but hard to say without having the fault codes at hand -

The best way forward really from this stage on and any garage would do this anyway as a first port of call - would be to get the car on a diagnostic machine and retrive the fault codes from the cars ecu and see whats been seen by the ecu as faulty as this will give a better idea or understanding as to what you need to do and check so to any good reputable garage or mobile mechanic even with the proper equipment to plug in should be able to that for you..I do hope this helps..If you need to ask anything else or include any further info then just continue before you rate

Customer: replied 3 years ago.

thank you very much do you think this an expensive repair?

Expert:  Robert replied 3 years ago.


Its pretty hard to say/answer at this stage with these kind of any point i get vehicles in my garage with problems such as yours it "has" to be scanned on diagnostic machine usually most test fees are in the £20 range see what fault codes the ecu has logged only then can you move forward in regards ***** ***** repair/fix and too whether its going to be expensive or not..I do hope this helps further

Customer: replied 3 years ago.

thanks i have looked at some prices for items you have mentioned

Expert:  Robert replied 3 years ago.


Yes ..but the diagnostic test has to be the first step with faults like you have to be able to see exactly the fault occuring..before even considering purchasing parts that may not be required...

Customer: replied 3 years ago.

thanks i wouldnt buy anything just wanted a rough idea

Expert:  Robert replied 3 years ago.
thats no problem..but going by experiance could well be cat / ignition fail / oxygen sensor ..might not be in your case however..but best to see what codes you have first...if you have the codes and need advise etc then your more than welcome to ask anytime....even after rating the answer above doesnt lock the can still come to it at any point..
Customer: replied 3 years ago.


Expert:  Robert replied 3 years ago.