gray-efc

Iv got an 03 wrx and the ecu light has started coming on, usually hwen im flooring it. Its coming on for a couple of days and then goes off again. Do you think this may be a dodgy sensor or something else? The car feels fine

Eprom

You will need to get the error code read by the dealer; this will tell you which sensor is showing a fault.

Not sure if the new age cars have the diagnostic connectors under the steering column, this would allow you to perform this task yourself.

Try a seach on ECU re-set

gray-efc

nice one mate!