Over the last weekend we drove from Lancashire to Austria via the tunnel and Paris. 500 miles on Saturday the car drove like a dream, totally faultless. Leaving Paris on Sunday, the first two hours or so I was driving with cruise control at 80 mph and just as I commented on how great the car was we lost all power and it flashed up on the screen as Restricted Performance and we dropped to about 30 mph. About 300 miles to go, three kids and a car full of stuff for skiing and all sorts of faults flashing up.

After stopping for a few minutes and starting again it was OK and I first kept the speed at about 50 mph, crept up to 60 and after a couple of hours risked 70 mph, later in the journey touching 80 mph with absolutely no problems just a lot of stress and disappointment. The car drives like a new car, smooth and bags of power at all engine and road speeds.

I read the fault codes with my IIDTool but just had a few bits about the audio system and something about the indicators, faults that seem to be there most of the time and nothing stood out as being linked to the Restricted Performance mode.

Does anyone please have any ideas what to check or do before we start the journey home on Sunday?

These sort of annoying flashes of doom and gloom are a bit of a feature and often occur as the result of a momentry spike somewhere. Having said that last November I had exactly the same reduced power experience with my 2014 Evoque, pulled off the M74 when I could (sudeen loss of power when you are doing 70+ on a two lane motorway with trucks all doing 60 in the inside lane is not good for the heart!) switched off and left the car to reboot all the ecu's on start up - there were no more nasty warnings. I drove home at normal motorway speeds and the next day took the car into the local dealership who were not the supplying dealership and they couldn't have been more helpful - they put the car on their diagnostic computer and found that the DPF sensor had been damaged. 3 weeks preeviously the car had had a gearbox software "up" grade that was really a downgrade and it had been problematical since. Transpired that there was a problem with the software. DPF sensor was on back order and the car was drivable so I was released with an appointment to take the car back the following week. I think if you haven't found any fault codes in the log file and the engine is running OK you should be OK to drive back home. 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

Thanks Tim,
I plan to just set off on Sunday and take it reasonably easy. Hope we get home OK.

Had exactly the same thing on mine today.... Bit worrying when driving at motorway speeds.... Turned off, restarted all ok!!!  2010 TDV8 Bali Blue........ "Alive Tuned"

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In case anyone is interested we had a fantastic journey back from Austria, sailed Europort to Hull and the RRS behaved beautifully, no restricted performance this time. Total distance was 1,774 miles, computer showed 26.1 mpg average and fill-to-fill calculates at 24.83. I can think of no better vehicle for such a journey but that incident on the way to Austria did rattle me.

I still don't know why it went into restricted performance and I am suspecting that I never will know.

Great that the return trip was uneventful, agreed about the car being a great Grand Tourer - even better at it than a FFRR in my view as the handling is that little bit firmer and less "floaty" than a FFRR's high speed ride 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

welcome back Tim .. have you had enough of the other LR options and decided to come back to the dark side  Another Pommie Bar Steward down under

MY20 Defender 110 SE P400 Eiger/Ebony
MY10 3.0 RRS TDv6 Fuji/Ebony/Anigre

Zilch, never really been away.............. but 1 x 3.6 TDv8 L322 FFRR, 1 x Evoque Coupe Dynamic (both excellent cars) and 1 x Evoque Dynamic 5 door that was a rattlefest and LR's attempts to remap the 9 Speed Gearbox for some obscure reason best known to them ended up with it destroying a DPF sensor and my patience running out, so after toying with a Celebration Edition 110 Defender, yes I'm back in an SDv6 HSE Dynamic RRS2, and very pleased with it too. 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

Was tempted at my LR dealership yesterday, but resisted Another Pommie Bar Steward down under

MY20 Defender 110 SE P400 Eiger/Ebony
MY10 3.0 RRS TDv6 Fuji/Ebony/Anigre

Following the Restricted Performance encounter a LR dealer read the fault codes and told me I need an "air flow meter", will be covered under warranty. Not sure if this is the airflow sensor but should find out on Monday.