P0090 Click for more details

Fuel pressure regulator control circuit,

Possible causes:
Fuel pressure control valve (PCV) circuit high resistance
FPCV circuit short circuit to ground
PCV failure

Check the fuel pressure control valve and circuits. Refer to the electrical guides. Check the resistance of the fuel pressure control valve. If the resistance is not between 0 and 5.4 ohms, install a new high pressure fuel pump (the fuel pressure control valve cannot be serviced separately). Refer to the relevant section of the workshop manual. Refer to the warranty policy and procedures manual if a high pressure fuel pump is suspect. Clear the DTCs and test for normal operation.