Thanks...that makes sense. Can I drive it (to the mechanic) in this state? I don't want to cause damage of course. It's about 10km away.

2000 S80 T6 215,000km: Started misfiring slightly this afternoon (engine was at normal running temperature at the time) then took it for a spin around the block and misfiring increased with flashing orange "check engine" light. I turned the car off, then restarted...misfiring continued and...