Really at my wits end now with this, since I had my stage 2 remap and a new actuator fitted I've had nothing but problems with my motor going into limp mode.
Code is P0234 Boost Pressure Control Circuit Negative Deviation which I believe is to do with over boosting. Thorney tried for 3 days to sort it out by changing the actuator, boost sensor and adjusting the actuator but still no joy. Last thing they said to me was the wastegate was sticking as I lost the turbo completely and a new turbo is needed. Can't see why as she pulls like a train in 1st and 2nd then the problems start from 3rd upwards whilst getting to high revs and high boost (approx 15psi). Can anyone help.to the VXR