ok, ive been throwing a CEL code one for about 5 days now, the car is in limp mode, (rev limiter at 4k rpm) . and i know that code one is a primary o2 sensor. my engine harness is converted to OBDI, so i only have one o2 sensor., but when i jumped the service connector, the CEL flashes real fast, not like a normal blink that indicates one number. i replaced the o2 last week, and the light was off for about a week, a few days ago, i unplugged my ecu, and since then, it has been on. i believed i had a short, because awhile ago, it would be on, then id randomly hit a bump in the road, and it would go off. so if this has happened to anybody else, let me know what you did, to fix it.

chipped p28 ecu, on hondata s200, running no cat, and the car runs fairly rich on the top end,

 

nothing?

 

if o2 sensor wired up correct, then its someting to do with your ecu setup, like s200 map