s2 MIL triggered

[fabrizio]

I have an s2 with race exhaust and cat pipe replacer.
After only 1500 Km of driving the MIL light has turned on. The car goes well without problems.
What does it means? what i can do? i'ts a dangerous issue? thanks in advance

[Bombjack]

It's probably due to your cat pipe. The ECU monitors carbon monoxide levels fore and aft of the catalyst, if they haven't been reduced by a suitable amount it assumes your cat has failed and the MIL light goes on. The revs/speed situation in which the test is performed is a fairly unusual one, which may explain why it took a while for the light to come on.

Whether this is a problem or not depends on the view your country takes of a car being operated out of its emissions spec. In the UK, such a car is technically illegal (although this would not be apparent to anyone until the MOT test, and if you blank the ECU and replace the cat before that...).

[fabrizio]

thank you for your reply. it is stuff dangerous for the engine itself? thanks in advance

[markqelise]

Check out the official website.
The Cat is not supposed to be removed from the S2, as there is a sensor both fore and aft of it.
Technically you should not be driving the car if the MIL light is on for emission reasons.
Also you may have invalidated your warranty.

[AwComm]

i just wanted to know if the engine is at risk. By the way lotus warranty and it's "features" are ridicolous so, belive me, it is the least problem