Just checked my MIL codes today. My light has been on for ages for a 0902 code (rear O2 sensor), so I check it when I get a chance. After driving for a week with the SC I thought it would be a good time to check.

I get code 0201, which on vbxmaxima.8m.com comes up as 'Ignition Signal Circuit'. Searching found that it is usually related to coil pack problems.

I have no noticible loss of power or misfiring. I do however have a Harlen Window switch taped into the signal wire on coil pack 5 (I think...right front one if you're looking at the engine from the front of the car). Could that be the problem?

Is there another way to find if a coil pack is dying, or find which one it could be?