UK Mazda 3 - Engine Management Light

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Jon - 19 Feb 2008 20:34 GMT

Hello all,

I have a 2007 Mazda 3 Diesel and for the past year, the engine
management light has been on. It has been back and forward to the
Dealership but they can't find any problems and are continuing to
look.

Does anyone else have experience of this or know what it could be?

Thanks in advance,

Jon

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OzOne - 19 Feb 2008 22:06 GMT

>Hello all,
>
[quoted text clipped - 8 lines]
>
>Jon

Time to start making phone calls and getting it fixed.
The dealer is obviously fobbing you off because it's not profitable to
properly investigate and clear the fault.

Ask them to organise a meeting with the service manager and a Mazda
rep. Be prepared to leave the car with them for a few days.

OzOne of the three twins

I welcome you to Crackerbox Palace.

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Zog The Undeniable - 20 Feb 2008 20:02 GMT

>> Hello all,
>>
[quoted text clipped - 15 lines]
> Ask them to organise a meeting with the service manager and a Mazda
> rep. Be prepared to leave the car with them for a few days.

Deos it have a particulate trap? Could the burn-off cycle have failed?
This seems to be quite common on the latest diesels.

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Jon - 20 Feb 2008 21:31 GMT

> >> Hello all,
>
[quoted text clipped - 20 lines]
>
> - Show quoted text -

Hi Zog,

It has a Dielsel Particulate Filter, is that what you mean?

Regards.

Jon

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Zog The Undeniable - 21 Feb 2008 20:50 GMT

> It has a Dielsel Particulate Filter, is that what you mean?

Yes - they are either electrically heated or something clever is done
with the fuelling, and hence combustion temperatures, to periodically
burn off the soot. If this isn't done, the exhaust gradually clogs up.
Modern diesels make a catalysed petrol engine look quite simple.

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