Took my 07 honda ELement to fix at a dealer . given them the coda P2647 rocker arm actuator bank 1stuck on . there fix vtec switch& oil switch.it was a lot of money and still got the same problem.now there say it the inside switch. so now there want more money.no wont buy a honda . no more.

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

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

P2645:'A' Rocker Arm Actuator Control Circuit/Open Bank 1 http://www.autocodes.com/p2645.html

P2647: Rocker Arm Oil Pressure Switch Circuit High Voltage http://www.autocodes.com/p2647.html

I am not sure why they would both come on at the same time but the code P2647 means - Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit High Voltage.

So first thing first in diagnosing this code is to check the oil level.
Have the engine run for a bit and get warm to build up proper oil pressure. Then turn engine off and let the vehicle sit for a minute or two. Have the vehicle on level ground and check the oil level and condition.
If the level is low then top up till it is at the full line. When the engine oil level is low it may not have enough oil pressure to control and activate the VTEC system thus causing this code.
If the oil is super dark and black then you may be due for an oil change. (should be done around every 5000km.)

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.

it is the unit attached to the cam shaft that varies the valve timing by moving the cam inside the gear
It is oil pressure operated and electronically controlled
take it to an accredited service center and have the job done professionally

P2647 VTEC oil pressure switch circuit high. The letter P stands for power train.When a code P2647 comes in the shop VTEC oil pressure switch usually fixes the problem. In front of the vehicle on the right hand side there is a VTEC solenoid valve one one the intake.Right next to it is the VTEC oil pressure switch . Both have grey connections. If you complain about rough idle then yes service solenoid (they do plug up from low end oil or lack of oil maintance).The code is circuit.that means that battery voltage has to be present. When the code P2647 appears VTC is disabled and valve timing is fixed at a fully ****** position.This is where you say you feel like its running out of gas is from.Switch is you just replaced it, a electrical diag has to be performed.From switch to PCM

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.

P2647 VTEC Oil Pressure Switch Circuit High Voltage - With Automatic Transmission Basicallly the sensor has gone bad or an oil passage has become blocked.

**. Locate the Variable Timing Electronic Control (VTEC) pressure switch on the end of the cylinder head. Honda has had problems with the VTEC oil pressure switch, there is an updated part number for the vehicle (37250-PNE-G01). On this vehicle the VTEC oil pressure switch can fail at any RPM.
2. The VTEC oil switch is normally closed, and grounds the reference voltage from the Engine Control Module (ECM) on the Blue/Black (BLU/BLK) wire. If the code sets at idle - 2500 RPM - and the Brown/Yellow wire has a good ground, then suspect a faulty VTEC oil pressure switch.
3. At approximately 2500-4000 RPM and when driving the vehicle, the VTEC system should turn on. To turn on the system, the ECM energizes the VTEC Solenoid valve and it allows oil pressure into the intake valve rocker arms, the oil pressure opens the VTEC oil pressure switch so the Engine Control Module (ECM) can verify that the VTEC did turn on correctly.
4. The code will set at idle to 2500 RPM if the reference voltage is not grounded. The code will set above 2500-4000 RPM if the VTEC oil switch does not open.
5. If the code sets at 2500-4000 RPM or higher, the problem can be a low oil level or pressure, or a malfunction in the VTEC assembly.
Potential Causes: Low Engine Oil
Plugged Oil Passage
Insufficient Oil Pressure
Plugged Oil Screen
Insufficient Oil Volume
Malfunctioning VTEC Oil Pressure Switch
Defective VTEC Solenoid