Ford Mondeo MK4 2.0 TDCi - Help with P0219 code and car cutting out - Eddie44

I'm having an issue with my car cutting out and engine management light coming on. This seems to happen when travelling downhill when foot is taken off accelerator which is very bizarre. Fault code P0219 engine overspeed condition comes up on my code reader. Has anybody got any idea why this is happening?

Freeze frame data:-

LOAD_PCT 0.0% ECT 78cM MAP 80.0kPa RPM1831/min VSS 67Km/h

IAT 26c MAF 34.62g/s TP 86.7% RUNTM 3751sec FRP 31900kPa

Thanks

Thanks

Edited by Eddie44 on 20/06/2021 at 10:17