B5.5 Passat in limp mode in wet!

[Lordbenny]

Driving on M3 at 70mph at 2500rpm in pissing rain suddenly when putting my foot down I got no more power. No dash lights and TBH it felt like I had a bit too much power for limp mode. When I stopped turned off and back on again I got all my revs in nutural. Any ideas?

[Lordbenny]

1.9 tdi 130

[Lordbenny]

Hub said:

So revs didn't rise, ie not clutch slip?

Nope! Couldn’t go faster than 70mph. When I stopped it reved to max rpm

[Lordbenny]

Left the car for 8 hours then had to drive home in similar rainy weather. The car was fine until it did it again after half an hour on the motorway. When I got off the motorway I pulled over switched the ignition off and back on again and the car was fine! There where no warning lights at all. Could this be the MAF sensor?