Quote Originally Posted by turbob20
if these things arent working or operational neither will you vtec. 1. up to operating temp which you wont be if you have a code 6 coolant temp code. 2.speed sensor working. 3. throttle pos sensor working. 4. oil pressure to v tec pressure switch. 5.spool valve or vtech solenoid and last 5.rpm window switch in ecu or tach. vtec presure switch code is 22 and solenoid is 21. in this chilton it says all these must work or be at normal operation temp coolant wise for vtech to engage. just get a coolant temp sensor and take off the ground for 10 secs and reset your ecu.hope this helps
couldnt have said it better myself.

not ALL CEL will disable VTEC. Only VSS, COOLANT Temp, etc listed above will.