Car: 95 cx hatch
Motor: JDM B16a SIR II (stock I/H/E)
ECU: chipped p28

So I got the motor in this weekend, didnt hook up vtec, threw 4 codes.
20 - electrical load
21 - vtec solenoid
22 - vtec pressure
36 - traction control

I hooked it up last night, only got code 20, went for a test drive and I didnt feel it kick in.
I pulled over and checked the cells, got codes 20, 22, 36.
Today, i took out the vtec pressure pin, put it back in and again, only code 20.
I went for a test and didnt feel it once again, checked the cells and this time, codes 20, 21, 36.
Grounds have been checked, my oil level, both look good.
(Ive read that vtec wont engage if there are other codes. Is this true??)

Im kinda out of ideas now. Can someone steer me in the right direction??

 

So u got both codes 21 and 22 the first time, but only code 21 the second time? If u keep getting code 21, check ur solenoid, u can see if it's working by directly hooking it up to the 12V battery positive side, u should hear a loud click, also try cleaning it, if u keep getting code 22 and u got plenty of oil, check the wiring, and also check the oil pan to see if it's dented, if it is, then there's a good chance ur oil pickup could be damaged causing this. Vtec will still engage with code 20, I got it and my vtec still engages. Try testing ur solenoid first and let me know what happens.