P2647 Code on 2007 Honda Pilot

you replaced the solenoid but the code refers to the actuator A bank 1--performance problem or actuator stuck off====causes wiring---rocker arm actuator
have it professionally checked and if faulty replaced , then the code will be cancelled

its on engine head

code p 2646 refers to rocker arm actuator A bank 1---performance problem or actuator stuck off=== causes wiring--- rocker arm actuator
discuss the problem with a service dealer shop or an accredited service shop that has experience on your make of vehicle
with rocker arm problems , to stop rotation it may be bottoming out on a valve spring and not letting the cam shaft turn .
talk with a shop for a proper diagnosis and quote

Not familiar with this particlar vehicle, bt the oil pressure switch is generally located below the heads, where the oil passage is parallel to the cylinder head.

you don`t say who gave you the code.if you gave them this code not wanting them to check for coeds then you started this problem by not allowing them to check for a code as they would do a more indepth code check then diagnois the problem better.in this case because they did all the work then they would be more inclined to give you a break and correct the problem compared to someone that gives them a code and doesn`t want anythng else done but the code problem putting the owness on the customers request.this is unfortunatly what happens alot because the customer won`t pay to have a job done correctly thinking they will save more money doing it this way.

this obd2 trouble code table can help you understand the meaning of code.

Could be a bad oil pressure sensor on bank one or low oil level ,or incorrect oil and filter.

p2647 is rocker arm actuator A- bank 1 stuck on--- to fix it should be the VTEC oil pressure switch. That switch will be on the cylinder head. Towards the windshield and passenger's side (I think).

Go to www . hondapartsdeals . com {remove the spaces when typing}

Go to parts, enter your car's info. System: Engine Component Vtec Oil control valve. That diagram should help a lot.

Good Luck.

the actuator is faulty and you could clean it, reset ECU error and check again