Check engine diagnosis

[DMK]

My 2000 classic 2.0WRX GT check engine light has been coming on. 

I've connected the black plugs together and am getting 2 long flashes followed by 2 short flashes.

Can anyone confirm if this means that the knock sensor if faulty please? I'm going to take it off and give it a clean anyway now but if the fault code is confirmed I'll probably replace it.

Thanks in advance.

[stuartie]

There's a thread in the how to section with all the manual flash codes in it where it tells you long flashes are 10 and short flashes are 1 👍

[DMK]

I can't find that thread. But if the flashing means 10+10+1+1 then fault code 22 seems about right. Thank you