It is recommended that the engine ECU is reset after any engine performance modifications have been made to the vehicle, including using a higher octane fuel, to accelerate the learning of any new parameters. Resetting the ECU will also clear any stored error codes, however if you have a fault with your vehicle it is advisable that these codes are retrieved rather than wiped as they may help in diagnosing the problem.
Make sure the ignition is turned off
Remove the engine bay fuse box cover
Remove the 20Amp/25Amp EFI fuse
Remove the 15Amp ECTS fuse
Wait for 30 seconds
Stick back in the two fuses
Replace the fuse box cover