Dc5 engine light help?

Hey guys I've got a base model DC5 sitting on 118xxx KMs and it's completely stock apart from a custom catback. Recently the engine lights come on whilst driving, and I've just pulled over and turned the engine off and back on (as instructed in the manual) and the light disappears. Sometimes it'll come on whilst driving, and other times it won't. Is this because its close to the 120K major service or is it just a minor issue?

Thanks in advance

Pull the code, it's probably a bad o2 sensor.

as above,

you either need a scan tool to you have to bridge the correct pins on the OBDII port to get the SCS bridged. ECU will then pump out the code

Covered a hundred times, pull the engine code from the FAQs.