Hello, A friend has an RSX with 2 DTC's.
One, P0135, stems from a bad fuel mix sensor (upstream oxygen sensor) which I see I can easily reach.

The other, P2647, pertains to the "rocker arm actuator control system stuck on for variable cylinder management system."

I've found pictures on this board of a clogged control system valve from the 6 cylinder engine which was successfully cleaned and returned to service.

Does anyone know where this valve is on the 4 cylinder engines?

Thanks, Terry

 

2nd one sounds like vtec controller

if you check out clubrsx, they have a page that lists the error codes with solutions