I have no idea what is going on with my Hybrid. The other day the diagnostic threw code 22 VTEC Oil Pressure Switch defective circuit or unplugged / defective oil pressure switch and I just checked it again this morning and now it's code 21 (VTEC Solenoid Valve defective circuit or unplugged / defective solenoid valve)

I'm going to check the wiring back to the shock tower and ECU and also the connection at the vtec solenoid...

Just have no idea why it would go from one code to the other. I did remove the vtec oil pressure harness the other day and plugged it back in. Maybe it was not on correctly and that is the problem with the solenoid valve

Be back in a minute......

Back ---> Checked the connections and everything looks good. Maybe time to take the car in to a shop

93 Civic Cx
98 GSR motor (usdm)

 

i had the same problem, either due to oil leak from a cam seal i had replaced, or my vafc. do u have a vafc?

 

What exactly is a vafc?

 

a aftermarket vtec controller

 

No vtec controller here.

I'm going to check the connections at the ECU, make sure the wires didn't get crimped / clipped between the harness and ECU, and also someone said their code 21 was due to a bad ground on the vtec solenoid. So, I'll check that as well.

If all else, I'm going to try my friends P72 ECU.

Thanks!