red triangle came on when i accelerated fast from the junction with engine management light, can hear whistling noise from drivers side vent when foot is off pedal

have done the following so far:

checked inlet manifold x 2 for cracks, no visual signs and no soot found under the engine cover
cleaned MAF sensor x 2, found oil in MAF sensor housing
checked air filter - 80% full of oil
cleaned MAP sensor
checked inlet hoses
checked inter cooler hose near front wheel
checked turbo actuator arm under wheel arch
checked actuator on CSOV under wheel arch

fault codes as below:

P1247 - DTC definitions NOT found - refer to manual

P006A - MAP mass or volume air flow correlation

P0235 - Turbocharger/Supercharger Boost Sensor A Circuit


Is there any other checks to be performed?

Have you had a look at the maf /.map live values to make sure it’s working? Bodsys Brake Bible
Software Updates Contact me
RRS Timed Heat/Remote kits - Contact me
BAS Engine Re-maps/ EGR Blank EuIII and EuIV
Clock On The Dash/ SNOTM /3Flash / BT Update /Service Reset/Error Codes read\ Gearbox Reset
See it HERE

IN what way have you checked the crossover valve?