Alright I own a 90 CRX Si ever since I got it the ECU has been throwing code but I didnt have a check engine light. So I ignored. One day I looked under my hood and my o2 wasnt connected so rewire it up, Still no check engine, Few weeks later i tried a a/f meter and worked fine, then decicded to remove and my car threw the CEL so i look the under the hood to see the wire that goes to o2 (yellow wire) was old, crack, and had a string of wire so i cut the wire till i found good wire and extended it with some wirin i had, I did everything plug the o2 and no more CEL, Few days later Im driving at a steady speed and cel comes on i stop look and o2 got unplug again put it on and it was gone, then i close the hood and leave spot but as soon as i punch it cel came on again and look once again 02 connected, i turn off the car and turn it back on no cel. I drive steady without punching it and cel again? i was getting mad already. So i park the car at home check all my plugs there all fine, i do a test and remove the hose that goes the TB from IM the idle goes up to 2500rpm and then after 10-30 sec cel come on the idle drops from 2500rpm in an instant. I check my ECU for code but i cant figure em out. This is what im seeing: turn key on....Quick flash, pause, flash, pause, flash, pause, 6 short flashes, pause, 10 short, pause, 20 short.... This is confusing me so far i thought of O2, IAT,injectors, ELD, The rest throws me off soo anything would really help sorry for the ESSAY.Thanks in advance

 

This is where all the codes are at and how to read them. Long Flashes are 10 and Short Flashes are 1.

https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/88-91-crx-ef-civic-frequently-asked-questions-faqs-1508680/


So if it went, LONG - LONG - LONG - LONG - SHORT - SHORT - SHORT it would be 43. Then after the shorts it will start a long again if there is multiple codes. After all codes are shown it will repeat itself.