ok. i was wondering if anybody could help me with this. in the past week my check engine light has came on twice, both times it has been the same code #21. i think its something to do with the vtec. both times the light came on when i downshifted to pass someone. i really cant feel any diffrence in the car after it comes on. i installed a vtec light and the ony thing i noticed was that the light came on 6000 and 6500 rpm after the check comes on (usually comes on at 5000) after i restart the engine everything is back to normal. any idea? or has anybody experienced this problem? thanks for your help

 

i forgot im running a 95 ex with a d16z6 thanx

 

check the vtec solenoid