Help with VTEC fault

Hello everyone, I'm looking for help with my 2001 Honda Civic with a D17A2 engine. I'm having a problem with the VTEC; it's not activating. (I've already checked the valve internally, and its filter is fine. There's 13.5 volts at the connector of the valve that activates the oil pressure. There's also 13.5 volts at the oil pressure switch. I changed the oil from 10W-30 to 10W-40, but the problem persists.) (Another issue) I have a fault code (0141) related to oxygen sensor 2. Could this code be preventing the VTEC from activating? Your help would be greatly appreciated.

Friend, I don't think the VTEC is malfunctioning because of sensor 2. It seems to me the oil is still too thin for the car... you could try 20W50. I hope this helps.

Since the data logger is faulty, it affects low-speed performance because, when accelerating, a phenomenon called an open loop occurs, where the ECU (engine control unit) blocks the signal from that sensor—in this case, the oxygen sensor.
It's possible that the valve that activates the system is stuck or damaged. Since it's a solenoid valve, you mentioned measuring the voltage at the connector but not the resistance at the valve.
Another possibility is the CMP (camshaft position) sensor,
which is necessary to inform the ECU about the valves.
It could be this sensor because the vehicle can start using the data provided by the CKP and TPS sensors.

I hope you find your problem.