I've been getting a ranom CEL from the ECU/Hondata latley, usually every morning I get it and I finally checked it.. it was a code 1 or 01 (1 fast blink), this on a P28 ECU w/ Hondata 2B attatched. Can somebody dig into their code books and let me know what OBD-I MIL code 1 is? Thanks

 

1
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 97-98 85-91 93-97 95-98 85-98
Oxygen Sensor "A" (Primary)
defective circuit or unplugged / defective sensor

 

Primary O2.. thanks guys. Could it be a result of excessive heat from the turbo? I've noticed my A/F gauge stopped lighting up as normal over the past 2 weeks which coincides with the CEL I've been getting. I still have the 02 sensor from my cat sitting in the garage, will that sensor plug into the primary's harness?

 

You can give it a try, but Honda lists seperate part numbers for the front and rear O2 sensors, and the rear one(cat) is actually more expensive, which is kinda odd since it's the front one that the ECU uses to adjust the fuel mixture. How close to the turbo is your front O2? Mine is about halfway down my downpipe, so it's not that far from the turbo, and I've had no problems with it. It's an EFI systems O2 sensor though, since my stock one died after I wired my A/F wrong