S1 111S MIL light

The MIl light is coming on on my S1 111S on the overun. It is off the rest of the time, OK through all the revs. But if I lift off at speed, or gear down for a corner the MIL light flashes or even stays on.

It's also ticking over a little rough and lumpy - seems to be hunting around the revs a bit. Cleaned the ICAV and reset the throttle sensor but no help.

Any ideas?

This should help.

My S2 does a similar thing - I'm convinced that it's a common problem. The fault code clears itself after a few warm-ups but then the MIL comes on again. Usually happens after a long run, when coming off the M-way and changing to stop/start driving. I bought (www.obd-2.com - much cheaper than main dealer diagnostics or a Lotus ScanTool!) to read what the code is and reset the MIL. I always seem to get P0137 (post cat O2 sensor low voltage) - it would be interesting to see what code everone else is getting.

Eddie King.