Td5 Discovery automatic M&S Lights no throttle

[Wings]

Td5 Discovery intermittent loss of power with M&S lights flashing,becoming quite scary especially with motorway driving. Been on going for 6 months, with three garages large bills, including Bristol Transmission, any recommendation for a Land Rover magician in the Bristol, South West area.

Car has been in to three garages, three parts fitted, three fairly large bills, the fault becoming quite scary, especially with motorway driving. When it happens I can usually keep the car in transmission, put the car into neutral, turn ignition key off then on, engine throttle power kicks in. This morning that wasn't possible, although I managed to limp home.

Spent the past hour trying to sort the M&S lights and get throttle power back, then with my foot fully depressing the throttle peddle, the M&S extinguished and throttle power fully returned. This may be fully coincidental, but with motorway driving, for obvious reasons I need to get the problem sorted. It sounds like a possible electrical problem ECU and/or throttle solenoid, would I be best placed to engage an auto electrician, rather than the attention of a fourth garage.

Incidentally I conducted a diagnostic check, and obtain the following code result,
Driver Demand Supply Fault
Ambient Pressure Circuit Fault

[Stepside57]

Hey mate I hade a discovery td5 auto I had the same problem its the xyz switch on the gearbox hope that helps. one way you can tell the switch has gone your reverse lights wont work when you put in reverse its not always the case. very commen fault like everything else on them lol.