Outer Limits 4x4 Board

As above, mate of mine has an '07 JK CRD Unlimted 4 door auto.
40 odd thousand K's, fully serviced etc.

It seems to be stuck in limp home mode (runs but no power).

Is there a way to 'reset' all the electronic jiggery-pokery? Disconnect the battery?

Is it a dealer job?
Has this happened to anyone else? What happened?

All advice welcome. Thanks.

Probably too late to be useful, but check the turbo hoses - they have a habit of popping off the intercooler connection.

The warnings can be reset by turning the ignition on, then pumping the throttle 3 times before starting the engine.