P2646 Honda- what is the cause of engine light turned on with this code??

Question

I just bought it from a dealer. At first it didnt have the light on. Oil has been changed recently

Answer 1

P2646 VTEC oil pressure switch circuit low voltage

Check the oil level that would be the first inspection. With this code the oil pressure should be checked, If the oil pressure is at manufactuer specification which is 57 psi replace the VTEC oil pressure switch

 Here the VTEC you would have to measure the oil pressure for the VTEC is the pressure meets manufactuer specification replace the VTEC oil pressure switch