Warning Light

My Engine Service Soon light has come on. The manual says the light indicates the exhaust emissions have deteriorated. What in turn would this indicate?

Thanks,
eastmtmini

I had the same problem a few years ago in my '05 Mini Conv. When I took it to the dealer I was told that it was caused by the additives used to boost the Octane in Premium grades of gas and to use Regular. This Service Engine Soon light problem was especially common with winter additive mixes. I started using Regular and never had the problem again.

BHunter54 wrote:I had the same problem a few years ago in my '05 Mini Conv. When I took it to the dealer I was told that it was caused by the additives used to boost the Octane in Premium grades of gas and to use Regular. This Service Engine Soon light problem was especially common with winter additive mixes. I started using Regular and never had the problem again.

I do believe that to be incorrect. Mini says to never use fuel under 91 octaine and that is the best we can get here. In New Jersey Sunoco has ultra 94 and my car was loving it.

That light can come on for a number of reasons, even for something as simple as not having you gas cap on tight will make the check engine light come on.

There are a variety of reasons that the light comes on. Knowing the error code that triggered the light is much more useful. We need to hook you up with someone that has a code reader.



One of the more common reasons is that the O2 sensor has degraded. They all do that after time. The sensor lives close to the engine in the exhaust system where it’s rather HOT. Replacing that sensor may be all you need to do. But that’s a guess. We need to get at that error code to really tell what’s going on. I don’t have one but I’m sure someone else in the club does. . . .