How to remove the vtec valve in Odyssey?

When vtec is not working, Honda Odyssey VTEC solenoid valve is in the engine compartment. The VTEC solenoid valve does not work, and the oil from the oil pump cannot pass through the VTEC solenoid valve. For the pressure switch, the voltage fed back to PCM is 0V. The switch is normally closed and the "pressure switch" is open.

Disassembly method of 03 Odyssey vtec valve

Fault phenomenon The engine fault light gives an alarm when driving, and the vehicle cannot run normally after the engine speed is 3000 rpm. The engine speed fluctuates up and down, so the ignition switch is turned off and the vehicle fault disappears again. HDS detected the vehicle, and the fault code P2647CVTEC oil pressure switch circuit voltage was too high.

How does PCM set the fault? From the VTEC circuit in Figure 1, the VTEC oil flow diagram in Figure 3 and the parameters of VTEC solenoid valve and VTEC oil pressure switch, it can be seen that the mechanism of setting the fault code by PCM is as follows: when the d VTEC is not working, the oil from the oil pump cannot pass through the VTEC solenoid valve; for the pressure switch, the voltage fed back to PCM is that the 0V switch is normally closed and the "pressure switch" is open.