Will engine warning light cause MOT fail?

foofi22

Hi

My engine warning light is permanently illuminated. The reason being the ECU does not like the new catalytic converter that has been fitted, after the old one developed a hole in it.

Every service the light has been reset but within a day or two it comes back on, apparently the only fix is to replace the Cat, which I don't really want to do so that a light isn't switched on!

So, will my car fail its MOT for having this light on? (I believe there are new rules now which govern this)

Can anyone recommend a code reader for a Peugeot 106 52 plate 1.1 petrol? Ideally it will be able to reset the code as well!

Thanks

PDC

It doesn't sound like it from reading this;

http://www.theaa.com/motoring_advice/car-servicing-repair/mot-changes-2012.html

Paperbird

As long as it passes the emissions test it is ok. Mine was on when it went for the test I asked and was told the only warning lights they bother with are brakes and airbag.

rev_henry

I believe that warning lights stuff hasn't come into effect yet. They keep putting it off because the new MOT regs are silly...

scaredofdebt

Yeah I agree with the above, my car had an airbag warning light on the dash and I thought it would fail due to the new regs but my mechanic said they've not come into force yet so I was OK.

Engine warning light isn't a safety issue, although it *could* be.

Fingers crossed!

Tobster86

Those new items are only advisories at the moment, and there is no confirmed date for them to become effictive.

PsiDOC

Although what concerns me is this new cat giving you a warning business.
This simply shouldn't happen. A cat is a cat. It heats up to a very high temperature and burns most of the noxious gases.
If your car "doesn't like the new one" - must admit never heared that one before - then this may give you issues passing the emissions test.

Psi

foofi22

PsiDOC wrote: »

Although what concerns me is this new cat giving you a warning business.
This simply shouldn't happen. A cat is a cat. It heats up to a very high temperature and burns most of the noxious gases.
If your car "doesn't like the new one" - must admit never heared that one before - then this may give you issues passing the emissions test.

Psi

I've had the 'new' cat for a couple of years now. Never had a problem with the emissions test. Apparently its because the replaced part is not a genuine Peugeot part so it complains...

Wongsky

foofi22 wrote: »

I've had the 'new' cat for a couple of years now. Never had a problem with the emissions test. Apparently its because the replaced part is not a genuine Peugeot part so it complains...

I'm struggling to understand how it knows?

Am I behind the times, or is all there is to monitor it, O2 sensors before and possibly after the cat? So if it's working fine, the ECU and engine management shouldn't know / give a hoot?

Was some of the wiring damaged / not put back, or is one of the sensors now fubar?

forgotmyname

As mentioned more like they damaged one of the sensors when fitting the CAT or didnt refit a sensor.

Have you had the fault code read?

Either way you should have taken it straight back to them. It maybe an issue with the next set of MOT updates.
But they have dropped a fair few things that it should fail on. So who knows what will and wont be added.

PsiDOC

Below is a pic of the cat you have.



The cat itself is the in the pot below the square flange then the exhaust pipe comes out of the bottom of the pot. Then at the bottom you can see the Lambda sensor that screws into the exhaust pipe.

On the cat itself there are no electronics to tell the car it's not an original cat. There's just the lambda sensor at the bottom that monitors the oxygen content in the exhaust.

A cat wether original or not should do the came job and the car should not be able to tell the difference. So the company that fitted it telling you that story were wrong.
Please get the code read from the car as the car is saying "Houston I have a problem". Then please post back and hopefully someone here can recommend some corrective action for you.
The car is a 52 plate petrol so any OBD2 reader can be used to read and clear the codes.
I am in Pembrokeshire and if you're close I'll be more than happy to read / clear the codes for you if you pop over to mine. Cost: £free only takes 2 mins to do.
Take care.
Psi