www.jec.org.uk

Faulty sensor perhaps?

Have you visually checked if the coolant level is low? There could be another leak somewhere.

Interesting, the system should reset itself I would have thought once the level is ok, see what happens after it is cleared. If persists I would definitely suspect the sensor.

Good result, may be worth buying a cheap code reader that you could use to reset fault codes, after noting them down obviously!
Many available, just enter code reader into amazon.

Glad it got sorted!

For a number of years, I've always carried in my car a simple OBDII bluetooth plugin and I have the Torque Pro App on my phone. Total cost of those two is £10. I use them every single week to do favours for neighbours and friends, reading engine error codes, resetting EML etc. The App also has the ability to read most of the digital data fed back to the ecu such as lambda readings, oil pressure, engine temp readings, AFR reading etc etc.

So absolutely cheap as chips and invaluable. Every owner of a post-94 car should have something like this and clearly cost is not a restriction.

Paul