Coming back from a recent trip to the Peak District the M went into limp mode with loss of power and speed restricted to no more than 20mph. I pulled over turned off the ignition and then restarted after a 5 minute break and all okay on the remainder of the journey back. Fault code reader comes up with 2D51 DME internal fault monitoring air path (2A2F also shown). Anybody else experienced anything similar? Cars booked in shortly to have the hydraulic pump motor repaired so may have to get this addressed at the same time?