Crv 2011 limp mode

[alanc]

Hi my CRV drives absolutely fine ,that is until I put my caravan on the back, it's ok until I come to a hill then engine light comes on and goes into limp mode. I use my obd tool to turn off and reset, next hill light on again. Honda have looked at it and said can't find the fault,anyone got any ideas as I'm getting pretty fed up

Codes it's throwing up

DTC P1236 BOOST PRESSURE TOO HIGH SIGNAL

DTCP00AF TURBORCHARGER BOOST CONTROL POSITION

SENSOR IMPLAUSIBLE