Could the car not be getting enough air into the engine, this meaning an issue with the MAF sensor?
Or it could be an injector fault. I have heard of cases on this engine of two injectors shorting out thus the ECU shuts down the car.
I also found this via googling:
Summary TPI Account №: 2014766/5
3.0 liter / 2.7 liter TDI: sporadic malfunctions of the engine permits the publication date: 10-08-2009
Problem Description Client / Conclusion station
The warning lamp lights up the engine and / or the engine stalls.
Errors in the engine control unit: P0200 (nozzle - an electrical fault in the circuit) or
P1195 (control valve fuel pressure open / short circuit to ground) or
P1281 (fuel metering valve, a short to ground) or
P1572 (valve left engine mounting -N144, short to ground) or
P2009 (regulating valve intake manifold, a short to ground) or ...
May be affected by all nodes connected to the corresponding branch harness: the fuel temperature sensor, glow plug control valve fuel pressure sensor, camshaft sensor, coolant temperature sensor, exhaust gas temperature, intake manifold flap, electro-pneumatic pressure transducer, high-pressure pump, terminal 50 starter switch reversing lamps, oil pressure sensor, the left support of the engine, generator, etc. kl.61
Technical Background
1. The engine wiring harness rubs against the arm of the fuel filter, causing electrical interference.
2. Engine harness rubs against the bracket 'bracket lifting motor', causing electrical interference.
The figure shows a bracket on the left side under the coolant expansion tank - the right-hand side may also be affected -> same metal bracket.
Fits in with what you say, when you toe it the engine will be moving more which may be causing a short between an injector harness wire and the chassis. Check the run of the harness from the engine back to the ECU.
hope I've helped.
cheers
Steve