as for the code E27
this denotes an error in the signal from the POS Sensor
the most common cause of this is generally the spark plugs being worn (wide gap from wear)
changing the spark plugs and properly gapping them generally fixes this problem but just for posterity i would also check the sensor wiring at the sensor.

and of course to reset this code as with any codes you can use the diagnoser program and a laptop or do the pedal dance as was previously described.