Van had been sat for a few weeks in the cold and wet. Now, shortly after starting the glow plug light and some strange warning light above it (that resembles a heart rate monitor) come on and remain on. The van drives fine and performance is fine, although it now won't rev higher than 3800rpm (If i'm honest I don't know if that was always the case). a quick google gives me suggestions like clogged EGR valve, turbo pressure boost solenoid, corroded/moist electrics/wiring, faulty glow plugs... Can anyone narrow it down more given the circumstances? - bearing in mind sitting unused for a while was probably the cause...