Hey guys, my car has codes 21- VTEC spool solenoid valve , 22- VTEC pressure valve , and 23- Knock sensor . The check engine light has been on since i bought the car from a friend of mine and vtec will not engage. Its running on a p30 ecu. I checked the wiring and everything seems to be hooked up fine. If i remember correctly the engine light wasnt on when he had the car a while ago but he did have a vtec controller in it at the time. I am new to hondas and not sure where to start. Any info/help is greatly appreciated. Thanks.

 

Anyone have any ideas?