Fault codes

[alexk]

I have a recurring fault (flashing glow plug in dash keeps coming back after I clear the fault codes). The codes read:

0522 engine coolant temp sensor (g62) 30-10 open or short to plus intermittent.

01265 to decode all DCTs 31-10 please register/activate

Does anyone know what either/both of them mean?

[Chrispb]

Check the wiring and connector to the coolant temperature sensor.
If its ok replace the sensor.

[alexk]

any idea which sensor this might be? As i recall there are two of them

[Chrispb]

If you have one in the housing that that the top hose is fitted to and one midway in the top hose, you need the one in the housing.