Hi my check Engine light keep on comming on everytime i drive it hard.... the code is;

2 fast blink.

do anyone know what 2 fast blink means?

 

what engine you got? if its from the 88-91 civic/crx then it would be "No signal to ECU"

 

My guess is that it's actually 12, and you read it wrong... That would be the EGR... Check it again, cause there's no 2 for a 4th gen...

 

Bakeoff is right, code 2 means a problem with the second O2 sensor circuit, which doesn't (shouldn't) exist in 4G cars. The only thing I can think of would be a defective ECU. Unless the O2 sensor was tripping some hidden second circuit for some reason... but that would be weird.

 

ok...one of my 02 sensor isnt plug in. becuz when i had my stock b16a1(89-91) headers it had 2 sensor on it. but when i put my Dc headers on, it only had one plug for the sensor so i just left one of the plug unplug.....