Today our Greenline lit up the heater plug lamp while driving, which then began flashing. This continued to flash, with the car driving OK. The light cleared when the ignition was switched off/on, with a scan giving the following result:-

1 Fault Found:

000564 - Boost Pressure Regulation: Limit Exceeded (Overboost Condition)

P0234 - 000 - -

Freeze Frame:

Fault Status: 01110000

Fault Priority: 1

Fault Frequency: 1

Mileage: 75285 km

Time Indication: 0

Freeze Frame:

RPM: 2394 /min

Speed: 97.0 km/h

Load: 44.9 %

Voltage: 14.29 V

Bin. Bits: 00000000

Absolute Pres.: 1550.4 mbar

Absolute Pres.: 1999.2 mbar

Readiness: 0 0 0 0 0

That very nice.