Hi guys been having power issues as of late and recently been getting "check engine" lights on cold engine accelerating in 3rd which doesn't come back on when I turn the car off and on

So I plugged in the diagnostic cables (black ones) and the error code it gave me was 17 long flashes followed by 3 short flashes. As far as I can tell that isn't a valid error code anyone got any ideas?

also that was the only error it gave me
I also reset the ecu on the weekend to see if this would help the power and engine light issue and it still continued.
Recent work includes new fuel pump (to try and fix pinging issue) and aircon service

Thanks in advance